Korean Texting Slang: ㅋㅋㅋ, ㅇㅇ, ㅠㅠ and the Rest

Before writing this I typed ㅋㅋ into the search box of the 표준국어대사전 — the Standard Korean Dictionary, published by the National Institute of Korean Language, the closest thing Korean has to an official word list.

Result: ㅋㅋ 찾기 결과 (총 0 개). Zero. Same for ㅇㅇ. Same for ㅠㅠ.

Then I searched a single ㅋ and got exactly one entry:

ㅋ 「명사」 한글 자모의 열한째 글자. ‘키읔’이라 이르며, ‘카’에서와 같이 초성 자리나 ‘녘’에서와 같이 종성 자리에 쓰인다. ㅋ, noun. The eleventh letter of the Korean alphabet. Called kieuk. Used in the initial position, as in 카, or the final position, as in 녘.

That gap is the subject of this article. The most-typed strings in Korean are not words — they’re letters, used raw, and the national dictionary can only describe them as letters. English has nothing equivalent, which is why explainers for foreigners quietly translate them into something they aren’t.

The table you came for

Typed	Comes from	Roughly means
ㅋㅋ / ㅋㅋㅋ	the sound of laughing (크크, 킥킥)	lol / haha
ㅎㅎ	하하 / 헤헤	a smile, softer than ㅋㅋ
ㅇㅇ	응응	yeah, yep
ㄴㄴ	노노 (“no no”)	nope
ㄱㄱ	고고 (“go go”)	let’s go, do it
ㅇㅋ	오키 (from “okay”)	ok
ㅈㅅ	죄송	sorry
ㅅㄱ	수고	good work / take care (a sign-off)
ㄱㅅ / ㄳ	감사	thanks
ㅊㅋ	축하	congrats
ㅠㅠ	crying eyes	I’m sad / dying

Now the part it can’t show you.

”lol” is an acronym. ㅋㅋ is not.

lol unpacks into laugh out loud; brb into be right back. They are initials of words, and those words exist independently.

Ask what ㅋㅋ unpacks into and the question fails. It is the consonant k, repeated — the noise of the laugh itself, written down. In a widely-read r/Korean post on typed Korean (around 540 upvotes), a Korean writer traces it to the giggling sounds 킥킥 and 큭큭, then adds the thing most guides skip: “nowadays, it became more like a filler to make the sentences sound more ‘lively.’ Koreans might feel like the conversation is empty and very business-like when there is no ㅋ being used at all.” Even at its most abbreviation-like, what it compresses is a sound, not a sentence.

ㅇㅇ works by a different trick, and this is the one that matters. It’s 응응 — “yeah yeah” — with the vowels deleted. Same author: Koreans “sometimes skip typing vowels to make it sound trendy and friendly.”

You cannot do that in English. Strip the vowels from yeah yeah and you get yh yh, a typo. Strip them from 응응 and you get ㅇㅇ — two real letters that any Korean reader reconstructs instantly, because in Hangul a consonant is a discrete, named, individually meaningful unit, not a fragment of a letter-block.

The extreme case is ㄳ: 감사, two syllables, squeezed into a single character using ㄱㅅ as a consonant cluster of the kind Hangul already permits at the bottom of a syllable (as in 몫). No Latin-alphabet move does this.

What the dictionary’s search box accidentally proves

Search ㅋㅋ in 우리말샘 (the Institute’s open dictionary) and it does not return nothing. It returns a wall of ordinary vocabulary: 카키, 칵칵, 칼칼, 칼콩. ㅇㅇ gives 아아, 아악. ㄱㄱ gives 가가, 가각, 가간, 가감 — thousands of them.

The engine is reading your consonant string as a 초성 search — a query for words whose initial consonants are those letters. It isn’t confused. It has correctly inferred that the letters are a skeleton waiting for vowels, which is exactly the operation a Korean reader performs on ㅇㅇ or ㅈㅅ, done by software.

Then the control case. Search ㅠㅠ and you get zero results in both dictionaries — 우리말샘 replies flatly that the string “은(는) 우리말샘에 등록되어 있지 않습니다,” it isn’t registered. Of course it isn’t. ㅠ is a vowel, and can never sit in the initial slot, so the 초성 search has nothing to find.

Which tells you something real: ㅠㅠ isn’t the same kind of object as ㅇㅇ at all. ㅇㅇ is a compressed word. ㅠㅠ is a picture — two vowels chosen for their shape, a pair of eyes with tears running down. Korean typing slang runs on three separate mechanisms (sound, skeleton, shape) that the usual lookup table flattens into one list.

Count your ㅋs. This is the part that will burn you.

ㅋ, ㅋㅋ, and ㅋㅋㅋㅋㅋㅋ are three different messages. The same r/Korean writer gives the rule directly: “it’s better to use at least two ㅋs because if you only use it once, it could sound like you are being rather sarcastic,” with a worked pair — 그러던가 ㅋ versus 그러던가 ㅋㅋ (both “up to you”) that “give different impressions.”

A reply on that thread, around 20 upvotes, explains the mechanism better than any textbook I’ve read:

“The reason one ㅋ sounds sarcastic is because it sounds like you repressed your laugh. You were starting to do the 크크크 but repressed it, and made a poker face and gave your line. Whereas more than one ㅋ is where it sounds like you are letting yourself go and laugh.”

A single ㅋ is a laugh that stopped — it reads as I am not going to say what I’m thinking: cold, clipped, sometimes contemptuous. Two is friendly. Five or more is genuinely laughing. So never send exactly one ㅋ until you can feel why. Two is the safe floor, it costs one keystroke, and it prevents the commonest accidental rudeness in Korean texting.

(Checked August 2026; Reddit fuzzes vote counts, so these move by a few either way.)

The space that gives you away

On a September 2025 r/Korean post titled “Texting like Koreans ㅋㅋㅋㅋㅋ” (around 345 upvotes), the top comment — roughly 40 upvotes — isn’t a question. It’s a diagnosis:

“Have you noticed that koreans say like 몰라ㅋㅋㅋ or 몰랔ㅋㅋ and gyopos and foreigners say like 몰라 ㅋㅋㅋ? They always add a space.”

Read 몰랔 carefully. 몰라 is I don’t know; in 몰랔 the ㅋ has been pulled inside the last syllable block and become its 받침, its final consonant. The laughter didn’t sit next to the word, it got absorbed into it. The post’s author confirmed it in reply (around 30 upvotes): “the ㅋ ends up becoming a batchim.”

Nothing in the Latin alphabet can do that. “I dunno lol” without its space is just broken. Hangul builds syllables in blocks, so a stray consonant has a legal slot to fall into — which makes the space bar a tell. Learners hit it out of habit; native texters often don’t. Deleting it is the cheapest single adjustment that makes your Korean texts read as less foreign.

One thing not to write in Latin letters

You will see Korean laughter romanized as “kkk” — on subtitle rips, in fan translations, in tweets. In English, KKK is the standard abbreviation for the Ku Klux Klan, an American white-supremacist organization, and English-speaking readers who don’t know Korean will read it that way first. It’s a collision between two writing systems, not a statement by anyone typing it, but worth knowing before you post “kkk” under a K-pop clip. The fix is trivial: type the Hangul. ㅋㅋ is two taps on any Korean keyboard.

Where the line is

The register is stricter than it looks. On another r/Korean thread cataloguing consonant-only slang (just under 300 upvotes), the Korean poster was asked who you can actually use these with, and the answer was narrow: “I would use them only with my friends. I wouldn’t use them with someone who I met for the first time or much older people.”

ㅇㅇ to a friend is normal; ㅇㅇ to your Korean boss is yep in reply to a work request — technically an answer, socially a shrug. The exception is ㅋㅋ and ㅎㅎ, which soften a message rather than shorten it, and do appear in semi-professional chats precisely because a bare sentence reads cold. The spoken equivalents of that softening instinct are 헐, 대박 and 진짜 — all three turn up constantly in these messages, usually with a ㅋㅋ attached.

FAQ

Is ㅋㅋㅋ in the Korean dictionary? No. 표준국어대사전 returns “총 0 개” — zero results — for ㅋㅋ, ㅇㅇ and ㅠㅠ, and 우리말샘 says outright that ㅠㅠ “은(는) 우리말샘에 등록되어 있지 않습니다.” Only the individual letter ㅋ has an entry, as the eleventh letter of the alphabet. That’s normal for internet orthography, and unlike 화이팅, which did make it in.

How many ㅋ should I type? Two minimum; one reads as sarcastic or cold. Three to five is ordinary friendly laughter, and long strings mean you actually laughed. Match roughly what the other person sent you.

What’s the difference between ㅋㅋ and ㅎㅎ? ㅋㅋ is a laugh; ㅎㅎ is closer to a smile and reads more careful. A Korean poster on the thread above put it as ㅎㅎ being “more like smiling whereas ㅋㅋ is close to ‘lol.’” Texting someone older or a colleague, ㅎㅎ is safer.

Can I invent my own consonant abbreviations? Somewhat — and this is the strongest evidence that these aren’t a fixed vocabulary list. A commenter on that same thread advised exactly that: “You can just make it up. They’ll get it. just take the first consonants… and put those all together.” It works because Korean readers are decoding a rule, not looking up entries. But decoding needs context: it lands when the underlying phrase is short and very common, and otherwise you just get asked what you meant.

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Written by Yongwoo Chung in Seoul, where the ㅋ key on my phone has visibly worn down. Companion pieces: 헐, 진짜, 대박.