Korean Culture & Trends
April 18, 2026
From blood types to MBTI, Teto-Egen, and now SBTI — a complete guide for foreigners curious about Korea's never-ending love affair with personality tests.
What Is SBTI? The Internet's Newest Personality Craze
If you've been scrolling through social media lately and keep seeing people post weird labels like "DEAD," "SEXY," "BOSS," or "ZZZZ" alongside the question "what's your SBTI?" — you're not alone in being confused. SBTI is the hottest new personality test on the internet right now, and it blew up almost overnight in April 2026.
So what exactly is it? SBTI officially stands for "Silly Big Personality Test" (though some sources also expand it as "Silly Big Type Indicator" or "Satirical Behavioral Type Indicator"). The name itself hints at the vibe: this is not a serious psychological tool. It's a self-aware, internet-native personality meme that originated from a Chinese content creator on Bilibili who decided to poke fun at the overly serious world of personality typing.
The test consists of 31 questions that measure 15 behavioral dimensions across 5 model groups. Based on your answers, you're assigned one of 27 unique personality types — and unlike MBTI's clinical-sounding four-letter codes, SBTI's type names are deliberately funny, blunt, and immediately relatable to anyone who spends time online.
💡 Fun fact: In Chinese, the abbreviation "SBTI" sounds phonetically similar to a vulgar slang word meaning "idiot" — and that's entirely intentional. The test is built on self-deprecating humor and the idea that no personality label should be taken too seriously.
All 27 SBTI Types — The Names Say It All
The genius of SBTI is that you don't need a manual to understand what a type means. The names do all the work instantly:
CTRL
The Puppeteer
Born to be in charge
BOSS
The Boss
Natural-born leader
SEXY
The Stunner
Effortlessly magnetic
GOGO
The Go-Getter
Endless energy
THIN-K
The Thinker
Always overthinking
MUM
The Mom Friend
Takes care of everyone
LOVE-R
The Hopeless Romantic
Too much love, too little realism
ZZZZ
The Playing-Dead Pro
Horizontal is a lifestyle
DEAD
The Flatlined
Emotionally... offline
POOR
The Laser-Focused Minimalist
Broke but intensely focused
MONK
The Monk
Detached from worldly drama
FUCK
The Wild Card
Genuinely unpredictable
※ The full list of 27 types also includes: ATM-er, Dior-s, THAN-K, OH-NO, FAKE, OJBK, MALO, JOKE-R, WOC!, SHIT, IMSB, SOLO, IMFW, HHHH, and DRUNK.
⚠️ Important disclaimer: SBTI is not a clinically validated psychological instrument. It was designed purely for entertainment, social sharing, and self-deprecating humor. Treat it like a fun internet quiz — not a life diagnosis. Don't make major decisions based on your result!
SBTI vs. MBTI — How Are They Actually Different?
Since SBTI's tagline when it first went viral was literally "MBTI is outdated. SBTI is here", it's worth taking a proper look at how the two compare. They're both personality tests that sort you into types — but beyond that, the similarities start to fade quickly.
| Category |
MBTI |
SBTI |
| Full Name | Myers-Briggs Type Indicator | Silly Big Personality Test / Silly Big Type Indicator |
| Origin | 1940s USA (Isabel Briggs Myers) | April 2026, Chinese Bilibili creator |
| Theoretical Base | Carl Jung's psychological types | 5 behavioral model clusters (non-academic) |
| Number of Types | 16 | 27 |
| Questions | 93 (official) / ~60 (16P free version) | 31 |
| Type Names | INTJ, ENFP, ISFJ (letter codes) | BOSS, DEAD, SEXY (plain words / internet slang) |
| Primary Goal | Self-understanding, psychological insight | Entertainment, social sharing, humor |
| Scientific Validation | Debated in academia (reliability concerns) | None — openly entertainment-only |
| Shareability | Medium (requires knowing the codes) | Very high (anyone gets it instantly) |
| Cultural Weight | Used in dating, workplaces, social introductions | Meme-first, but quickly gaining social currency |
The Core Difference: "Understanding Yourself" vs. "Expressing Yourself Right Now"
Think of MBTI as a personality passport — a semi-permanent label that follows you around and tells people who you fundamentally are. SBTI, on the other hand, is more like a mood ring for the internet age. When someone says "I'm literally DEAD right now," they're not claiming a fixed identity — they're communicating their current emotional state in the most efficient, relatable way possible.
This distinction is crucial. MBTI requires a learning curve: you need to know what "I" vs. "E" means, what "N" and "S" refer to, and why someone being an "INTJ" might make them compatible or incompatible with you. SBTI removes that friction entirely. BOSS, DEAD, and SEXY need zero explanation. That's not an accident — it's the entire design philosophy.
💡 Neither MBTI nor SBTI has strong scientific backing in terms of predicting real-world behavior. Even MBTI, despite its widespread use in corporate training and HR, has been repeatedly criticized by psychologists for low test-retest reliability — meaning many people get a different result when they retake it months later. SBTI at least doesn't pretend to be something it's not.
Why Did SBTI Explode in Just 3 Days?
SBTI's rise wasn't a slow burn. It was a detonation. From April 9 to April 11, 2026, it went from an obscure Bilibili creator's project to an all-platform global screenshot meme — racking up over 40.85 million searches on WeChat alone and crashing its own website multiple times due to traffic overload. Here's exactly how it happened:
Day
1
April 9 — Ignition
Chinese Bilibili creator @蛆肉儿串儿 posted a video about SBTI. The test spread almost instantly across WeChat Moments, Weibo, and Xiaohongshu. The tagline that fueled it: "MBTI is over. SBTI is here." — a single sentence that borrowed MBTI's massive existing awareness while positioning SBTI as the exciting new challenger.
Day
2
April 10 — Feed Saturation
The original test site went down repeatedly due to traffic overload — and paradoxically, the crash became proof that something huge was happening. Mirror sites and reposted versions multiplied. Media outlets began covering it. The story shifted from "fun test" to "nationwide phenomenon," which attracted millions more curious users.
Day
3
April 11 — From Meme to Discourse
SBTI stopped being just a thing people were sharing and became a thing people were arguing about: "Is this more accurate than MBTI?", "Why did this go viral?", "What does my type really mean?" Secondary content — explainer articles, reaction videos, comparison posts — created a second wave of reach far beyond the original audience. Korea, Japan, and English-speaking countries joined the conversation.
6 Reasons SBTI Was Engineered to Go Viral (Even if Accidentally)
① The result IS the content. Each SBTI result card is visually clean, instantly readable, and requires zero caption to understand. You screenshot it, post it, done. The test generates social media content on your behalf.
② Zero learning curve. Unlike MBTI where you have to learn what four letters mean, SBTI types are self-explanatory internet vocabulary. "DEAD" communicates in one word what would take a paragraph to explain otherwise.
③ The perfect emotional cocktail: funny + painfully relatable. The most common reaction to SBTI results is: "This is ridiculous, but also... why is it so accurate?" That combination of amusement and mild existential crisis is scientifically known to drive sharing behavior.
④ Every participant becomes a distribution node. Unlike passive content, a personality test creates a new piece of unique content with every person who takes it. More participants = more unique posts = more reach.
⑤ It gave people permission to express burnout as comedy. SBTI launched at a time when anxiety, burnout, and social fatigue were near-universal among young people. Types like "DEAD," "ZZZZ," and "IMSB" (The Self-Doubter) gave people a low-stakes, humorous way to say "I am not okay" without it being a cry for help.
⑥ The website crash was the best advertisement. When something breaks under its own popularity, it signals "everyone is doing this." FOMO (Fear Of Missing Out) kicked in hard, pulling in millions of people who wouldn't otherwise have cared.
Why Are Koreans So Obsessed with MBTI?
This is the question that Western journalists, international students, and tourists in Korea ask most frequently. You land in Seoul, meet some locals, and within ten minutes someone asks: "What's your MBTI?" — with the same casual confidence an American might ask "what do you do for work?" or an Australian might ask "where are you from?" It happens everywhere: dates, job interviews, group chats, variety shows, and even sports broadcasts.
A 2024 academic study published in MDPI Sustainability found that 68.5% of South Koreans expressed positive sentiment toward MBTI, making it arguably the most socially embraced personality framework of any country in the world. CNN famously described it as a country that "fell in love with an American World War II-era personality test." But why Korea specifically?
Reason 1: Confucian Collectivism Demands a Social Shorthand
South Korea's social culture is deeply rooted in Confucian collectivism — a worldview that emphasizes group harmony, defined roles (student, colleague, elder, junior), and reading the room before speaking your mind. In this environment, directly asking someone "what kind of person are you?" or "how do you handle conflict?" feels intrusive and awkward.
MBTI solves this problem elegantly. "I'm an INFJ" carries an enormous amount of social information in four letters — how you process emotions, how you prefer to communicate, whether you need alone time, whether you'll be the one who plans the group trip. In Korea's relationship-heavy culture where understanding someone's personality quickly is socially essential, MBTI became the most efficient tool available. As one LinkedIn analysis put it: "MBTI isn't about psychology in Korea. It's about communication."
Reason 2: COVID-19 Triggered a Mass Inward Turn
MBTI was gaining traction in Korea from around 2018, but the COVID-19 pandemic in 2020 was the catalyst that turned a growing trend into a nationwide phenomenon. With social distancing forcing people indoors and cutting off typical social connections, millions of Koreans suddenly had both the time and the emotional need to reflect on themselves. The free 16Personalities online version lowered the barrier to entry completely, and the test spread through KakaoTalk group chats like wildfire during lockdowns.
Reason 3: The "MZ Generation" Identity Crisis
Korean Millennials and Gen Z — collectively called the "MZ Generation" (밀레니얼+Z세대) — face a particularly acute form of identity anxiety. Intense academic competition, a brutally competitive job market, sky-high housing costs, and the pressure of maintaining an immaculate social image all contribute to a generation constantly questioning: Who am I? Where do I fit? MBTI offers a reassuring answer: you're an ENFP, or an INTJ, and that means something — even if what it means is partly fictional.
Reason 4: It's Used in Real Life — Sometimes Controversially
Here's something that shocks most foreigners: in South Korea, MBTI has gone far beyond casual conversation. Many dating apps display your MBTI type alongside your photo, height, and hobbies. Some companies have informally (and sometimes formally) used MBTI in hiring decisions, with a reported bias against introverted "I" types in customer-facing roles. This usage has drawn significant criticism — and rightfully so — as it raises serious questions about personality-based discrimination in hiring and dating.
| How MBTI Is Used in Korea |
What It Means in Practice |
Controversy Level |
| First-meeting icebreaker | Replaces "What do you do?" as an opener | Low — generally accepted as friendly |
| Dating app profiles | MBTI listed alongside height, age, job | Medium — can create unfair bias in matching |
| K-pop & celebrity culture | Idol groups publicly reveal their types on variety shows | Low — fans enjoy the content |
| Workplace introductions | "Hi, I'm Jiwon, I'm an ENFJ" is normal at new jobs | Low–Medium |
| Hiring decisions | Some companies asked for MBTI on applications | High — criticized as discriminatory and pseudoscientific |
📌 A note on MBTI's scientific credibility: Most academic psychologists are skeptical of MBTI. Studies show that roughly 50% of people get a different result when retaking the test just a few weeks later. The Big Five (OCEAN) personality model is generally considered far more robust by researchers. MBTI's popularity in Korea — and globally — is largely a cultural and social phenomenon, not a scientific one.
Teto & Egen — Korea's Hormone-Inspired Personality Trend
By mid-2025, some Koreans were already developing what you might call "MBTI fatigue." After years of the same sixteen types dominating every conversation, a new challenger arrived: the Teto-Egen test. It swept through Korea's MZ generation so thoroughly that international outlets including The Straits Times, Times of India, and Chosun Ilbo English covered it. When SNL Korea aired a skit called "When a Teto Man Falls in Love" in July 2025, it drew over 2 million viewers.
What Do "Teto" and "Egen" Actually Mean?
Teto (테토) is short for Testosterone, and Egen (에겐) is short for Estrogen. The test uses the popular associations of these hormones — boldness and directness for testosterone, sensitivity and empathy for estrogen — to categorize personality styles. Crucially, this is not about biological sex. Anyone of any gender can be Teto or Egen, and the labels are meant to describe behavioral patterns, not hormonal levels.
| Trait |
Teto Type (테토형) |
Egen Type (에겐형) |
| Hormone Analogy | Testosterone | Estrogen |
| Decision Making | Fast, instinctive, logic-first | Thoughtful, feeling-oriented |
| Social Style | Goal-driven, competitive, direct | Harmonious, empathetic, relational |
| Emotional Expression | Reserved, action over words | Expressive, emotionally open |
| Under Stress | Problem-solving mode | Seeks emotional support first |
| Applies To | All genders | All genders |
Why Did It Catch On?
After years of sixteen-type MBTI complexity, the binary simplicity of Teto vs. Egen felt refreshing. You don't need to remember four letters or their meanings — you just know if someone is more of a "bold, direct doer" or a "sensitive, relationship-focused feeler." The test also tapped into Korea's deep interest in dating compatibility — the most searched combination was "Teto man + Egen woman" compatibility, feeding into the same cultural appetite for romantic compatibility frameworks that once drove blood type obsession.
The trend also exploded on short-form video platforms — TikTok-style reels showing "Teto girl vs. Egen girl reacting to the same situation" became a viral content format with millions of views per video.
⚠️ The scientific problem with Teto-Egen: Personality psychologists point out a fundamental flaw — while sex hormones do influence physical characteristics (muscle mass, skin texture, bone structure), they do not directly determine social behavior, communication style, or personality traits. Human personality is shaped by genetics, upbringing, culture, and lived experience — not hormone levels. Using hormone names as personality labels is a poetic metaphor at best, and a misleading oversimplification at worst.
Blood Type Personality — Where It All Started
Before SBTI, before MBTI, before Teto-Egen, there was something even more fundamental in Korea and Japan: the belief that your blood type reveals your personality. If you've ever watched a Korean drama or variety show from the 1990s or 2000s and noticed characters mentioning blood types in romantic contexts, this is why.
The Origin — A Dark History Cleaned Up for Pop Culture
The story of blood type personality theory begins in early 20th-century Japan. In 1916, Japanese doctor Kimata Hara first explored the idea, and in 1927, eugenicist Furukawa Takeji (古川竹二) published a paper claiming blood type predicted character traits. Darker still, this research emerged from a pseudoscientific milieu tied to imperial-era racial theories that sought to classify and rank populations. After World War II, the explicitly racial dimensions were discarded — but the idea of personality-by-blood-type survived in popular Japanese culture and eventually crossed into Korea.
How It Became a Cultural Staple in Korea and Japan
By the 1980s and 1990s, blood type personality had become deeply embedded in both Japanese and Korean popular culture — appearing in manga, TV dramas, magazines, and casual conversation. It became so normalized that in both countries, most people know their blood type off the top of their heads (something that's extremely uncommon in the West, where most people have no idea what blood type they are unless they've had a medical procedure).
| Blood Type |
Korean/Japanese Stereotype |
Western Zodiac Equivalent |
| Type A | Organized, anxious, perfectionist, reserved | Virgo / Capricorn energy |
| Type B | Selfish, creative, free-spirited, passionate | Aries / Sagittarius energy |
| Type O | Social, confident, insensitive, natural leader | Leo / Aries energy |
| Type AB | Mysterious, rational, unpredictable, "weird" | Aquarius energy |
Blood type personality theory has zero scientific basis — large-scale studies involving hundreds of thousands of participants have consistently found no meaningful correlation between blood type and personality. Yet its cultural persistence in Korea and Japan is a fascinating example of how a pseudoscientific idea, once embedded in popular culture, can survive long after its debunking — simply because it fulfills a social function.
By the 2020s, MBTI had largely replaced blood types as Korea's go-to personality framework. But the blood type era left a lasting imprint on Korean social culture — specifically, the idea that a simple, shareable label can serve as a powerful social shorthand for "this is what kind of person I am."
The Big Picture: Why Does Korea Keep Doing This?
Looking at the full timeline — blood types in the 1990s, MBTI from 2018, Teto-Egen in 2025, SBTI in 2026 — a clear pattern emerges. The specific tool changes every few years, but the underlying need it serves remains constant. Korea's relationship with personality typing is not a series of random trends; it's a recurring cultural response to deep-rooted social needs.
1990s
Blood Type Personality Era
4 categories. Simple, social, pre-internet. Widely used in dating and casual social sorting across Korea and Japan. No scientific basis, but enormous cultural uptake through TV, magazines, and word-of-mouth.
2018–
MBTI Era — Supercharged by COVID-19
16 categories. Depth and nuance for the smartphone generation. Free online access via 16Personalities. Became a universal social language — in dating apps, workplaces, friend groups, and K-pop fandom culture.
2025
Teto-Egen Era — The Anti-MBTI Simplicity Play
2 categories. Maximum simplicity for MBTI-fatigued users. Hormone-themed, gender-bending, and tailor-made for short-form video content. 900,000+ participants on the Types platform within weeks of launch.
2026
SBTI Era — The Meme-First Personality Test
27 categories. Laugh-first design, zero academic pretension. Built for screenshotting and sharing. Originated in China but instantly resonated globally — the first truly post-ironic personality test of the internet age.
The Psychology Behind the Obsession
The Barnum Effect plays a major role. Named after showman P.T. Barnum, this well-documented cognitive bias explains why people readily accept vague personality descriptions as uniquely accurate to themselves. "You tend to be kind, but you have limits" applies to virtually everyone — yet feels like a personal revelation when framed as a personality test result.
Beyond that, researchers point to self-categorization theory — the human need to belong to clearly defined social groups. Personality tests give people a ready-made community: "fellow INFPs," "fellow Teto-types," "fellow DEAD SBTI people who are holding it together, barely." In Korea's highly group-oriented social culture, this need is especially acute.
Finally, there's what social scientists call social currency — shared cultural knowledge that facilitates bonding and conversation. In a country with a powerful conformist social current, knowing someone's personality type provides a safe, structured way to discuss differences without causing offense. "Oh, you're an ESTJ, that makes sense why you like structure" is a much softer observation than "You're kind of controlling, aren't you?"
💡 The bottom line for foreigners visiting or living in Korea: When a Korean person asks your MBTI (or soon, your SBTI), they're not being intrusive — they're being friendly. It's the Korean equivalent of a social handshake. You don't need to take the result seriously, but knowing your type (or having a fun answer ready) will genuinely help you connect with Korean people faster and more naturally.
Will SBTI Replace MBTI in Korea?
Probably not in the long run — but it doesn't need to. SBTI is doing something different. It's not trying to be a serious personality framework; it's a cultural moment, a viral ritual, and a collective exhale. Like blood types before MBTI, and Teto-Egen before SBTI, it represents the next evolution in how a digitally native generation finds language for the ineffable question of "Who am I, and how do I tell you quickly?"
What's certain is this: as long as humans need identity, community, and a reason to start a conversation, there will be a new personality test waiting to fill that need. Korea just happens to be the country that takes it most seriously — and most joyfully — every single time.
