미친

Literally "crazy" but used as an intensifier — can mean something is insanely good, bad, shocking, or impressive. One of the most versatile words in Korean slang. Tone and context determine whether it's positive or negative.

Commonly used between close friends — avoid using around parents, elders, or in formal settings. Can come across as highly offensive depending on who's listening.

positive example: Wow 미친! that's awesome!

negative example: Ah.. 미친.. that's totally messed up.