ㅋㅋ

kk

What it means

LOL — written laughter.

Where it comes from

Imitates laughing sounds like 크크 or 키키; more ㅋ means bigger laughs.

When you'd use it

Any casual chat message.

Example

그 영상 봤어? ㅋㅋㅋDid you see that video? LOL

Careful

A single ㅋ can read as cold or sarcastic; never in formal emails.