What this means: ㅇㅊ ? Of the short form of Hangul I know these: ㅇㅇ [응] – Yes. ㅉㅉ – tsk tsk (that clicking sound you do with your tongue when you are displeased with someone). ㅇㅋ [오키] – Okay. ㄱㅅ [감사] – Thank you. ㅊㅋ [축하] – Congratulations. ㄴㄴ [노노] – No. ㅈㅅ [죄송] – Sorry. ㄱㄷ [기다려] – Wait. ㄱㄱ [고고] – Gogo. ㅂㅂ [바이 바이] – Bye Bye. ㄷㄷ [덜덜] – Trembling ㅅㄱ [수고] – Well done / Good job. ㅊㅊ = Congrats ㅗㅗ = F*ck you ㅡㅡ - WTF ㅁㅊ - Crazy ㅎㄹ - Daebak 짱 - Best, Top of top or Super etc...