ㅁㅊ /mi-chyeot-da/
Crazy / Insane
Short for 미쳤다 (micheotda = went crazy). Used to express that something or someone is insane — usually in a positive, awe-struck way.
Examples
이 노래 ㅁㅊ 너무 좋아
This song is insane, I love it so much
걔 ㅁㅊ?
Is that person crazy?