Everyone searches for this. No textbook covers it properly. Here's what Korean swear words actually are, what they mean, and the social rules around when they get used.
You're watching a Korean drama and someone mutters something under their breath.
The subtitle says "dammit" or "jerk" — but you heard a Korean word you didn't recognize.
You search for it. The textbook has nothing.
This is the most-searched topic in Korean language learning that no class covers. Here's what you actually need to know.
A note before we start
Korean swearing has a social logic. Swear words in Korean are used freely among close friends of the same age — but using them toward someone older, in a professional setting, or with someone you don't know well is a serious breach of respect. The words themselves matter less than the context and relationship.
The words
야
Romanizationya
Meaninghey! (sharp, confrontational)
💡 Not always a swear word, but in the wrong tone it becomes one. 야! directed at someone angrily means something like 'Hey!' or 'Oi!' — confrontational, rude to strangers or elders. Between close friends it's completely normal and affectionate.
씨발
Romanizationssibal
Meaningthe f-word equivalent
💡 The strongest Korean swear word. Used in moments of sudden frustration, pain, or shock — often alone, as an exclamation. Also combined with other words. Extremely rude in formal settings or toward strangers. Among close same-age friends, somewhat normalized as an expression of frustration.
개
Romanizationgae
Meaningdog (used as a profanity prefix)
💡 개 means dog. When placed before an adjective or noun it intensifies or degrades — 개나쁘다 = unbelievably bad. Also used positively in slang: 개좋아 = freaking love it. The intensifying function goes both directions.
미쳤어?
Romanizationmichyeosseo?
MeaningAre you crazy? / What's wrong with you?
💡 미치다 means to go crazy. 미쳤어? asked with disbelief means 'Are you out of your mind?' Can be teasing between friends or genuinely confrontational — tone determines everything.
닥쳐
Romanizationdakchyeo
Meaningshut up (rude)
💡 A blunt command to be quiet. Very rude toward strangers or elders. Between close friends it can be said in exasperation without real offense — but it always carries an edge. The polite way to ask someone to be quiet is 조용히 해주세요.
바보
Romanizationbabo
Meaningfool / idiot (mild)
💡 One of the mildest insults — calling someone foolish or silly. Often used affectionately between friends and couples: 야, 바보야 = Hey, you silly thing. The severity depends entirely on tone and relationship.
Social rules around 욕 (swearing)
욕 in context
Close friends, same age, casual setting
A
A
야, 나 오늘 지갑 잃어버렸어.
Hey, I lost my wallet today.
B
B
씨발, 진짜? 어디서?
Damn, seriously? Where?
A
A
모르겠어. 완전 개짜증나.
I don't know. It's freaking annoying.
B
B
미쳤어? 카드 정지는 했어?
Are you serious? Did you cancel your cards?
A
A
아, 맞다! 바보같이 그것도 못 했네.
Oh right! I stupidly didn't do that either.
Severity levels
WordSeverityContext
바보Very mildOften affectionate between friends
미쳤어?Mild–mediumTeasing or frustrated disbelief
개 + wordMediumCasual intensifier among friends
닥쳐StrongRude except with very close friends
씨발Very strongOnly close same-age friends, or alone
Cultural note
Korean swearing is deeply tied to 나이 (age) and 관계 (relationship). The same word spoken by a close friend sounds completely different from the same word spoken by a stranger or used toward someone older.
Korean society has strict norms around respect — 욕 is the violation of those norms, which is exactly what gives it its force. Used among equals who are close, it signals intimacy and comfort. Used incorrectly, it causes real offense.
The safest rule: understand these words, recognize them when you hear them, and hold off on using them until you're fluent enough in both Korean language and Korean social context to know when they fit.
