ㅋㅋ, ㅎㅎ, ㅇㅇ — Korean texting slang explained (what does ㅋㅋ mean?)

Your Korean friend sends a message. It is just "ㅋㅋㅋㅋ". No vowels, no words. Is the keyboard broken?

Not at all. Your friend is laughing. Korean chat is full of these tiny letter codes. Once you see the trick, you can read most of them yourself.

Why only consonants?

Every Korean syllable is a block. It starts with a consonant, like ㄱ or ㅋ, and has a vowel, like ㅏ. In chat, people often type only the first consonant of each block. It is fast, and it feels relaxed.

The Korea Herald describes the most famous example. The consonant ㅋ (kieuk, a "k" sound) is typed several times without a vowel to copy the sound of laughing. It works like "lol" in English.

Even language experts find these codes interesting. In a 2026 answer, the National Institute of Korean Language said there are different views on what kind of language unit "ㅎㅎ" and "ㅋㅋ" are. In other words, the dictionary people are still thinking about it. Everyone else just uses them.

Let's read a group chat

Here is a short, made-up chat between two friends, Mina and Jun. The right column shows what each line means.

Notice how each code comes from a real word. 응 (eung) is casual "yes," listed in the learners' dictionary. Type only its first consonant twice, and you get ㅇㅇ. 오케이 is "okay." 감사 is the start of 감사합니다, "thank you."

ㅋㅋ or ㅎㅎ — is there a difference?

Both are laughing. Many people feel a small difference in mood:

• ㅋㅋ (kk) — a bigger laugh, like "lol." More ㅋ often looks like more laughing. "ㅋㅋㅋㅋㅋ" is a lot.
• ㅎㅎ (hh) — softer, like a smile. It comes from the sound 하하 (haha), which the dictionary lists as the sound of laughing out loud. In chat, ㅎㅎ often feels gentle and polite.

This is a feeling, not a rule. People are different. But if you write to someone older, a single ㅎㅎ is usually safer than ten ㅋ.

The ones you'll see most

These codes are not in the dictionary, and they change over time. Still, you will see these again and again:

• ㅇㅇ — "yes" (from 응응)
• ㄴㄴ — "no, no." Many people read it as 노노.
• ㅇㅋ — "okay" (오케이)
• ㄱㅅ — "thanks" (감사)
• ㅈㅅ — "sorry" (죄송)
• ㅊㅋ — "congrats" (축하)
• ㅠㅠ or ㅜㅜ — sad or touched. The shape looks like eyes with falling tears.

A good way to check a new one: guess the word from its first consonants. ㅊㅋ → 축하 (chukha, "congratulations"). It works more often than you think.

Where do Koreans text?

Mostly on 카카오톡 (KakaoTalk), often just called 카톡 (katok). The Korea Herald reported that the app had about 49.1 million monthly active users in the second quarter of 2025. That is close to the size of Korea's population.

Can I use these at work?

Be careful. Codes like ㅇㅇ and ㅋㅋ are casual, like 반말 (banmal, casual speech). With a teacher, a boss or someone you just met, write full words. Our guide to polite and casual Korean explains why the level matters.

So the rule is simple. With friends, ㅋㅋ is warm. With your boss, maybe save it for later.

Try it yourself

This trick only works because of how Hangul is built. Each block has its parts, and you can pull out the first one. King Sejong would probably be surprised. Read the story of the alphabet in our piece on Hangul Day and King Sejong.

Three quick ones. Cover the answers:

1. ㄱㅅ → 감사, "thanks"
2. ㅇㅋ → 오케이, "okay"
3. ㅊㅋ → 축하, "congrats"

If K-pop chat is where you met these codes, our list of K-pop fandom words has more. And when your friend sends 대박 after your news, here's what it means.

In one line: Korean chat drops the vowels — ㅋㅋ is a laugh, ㅎㅎ is a smile, and ㅇㅇ is a lazy "yes."

Want more Hangul puzzles? Today's 5 questions are waiting. ㅎㅎ