How do I say 'I don't believe you.' in Korean
(informally/casually) towards close friends

Question

Answer

"I don't believe you."

* standard way:
- (난) (널) 믿지 않아 / 믿지 못해.
- (난) (널) 안 믿어 / 못 믿어.

* colorful, slangy way (among kids, for example):
- 그걸 누가 믿어? = Who would believe that?
- 웃기지 마. = You're kidding.
- 뻥치지 마. = Don't give me that bull.

Answer

난 널 믿지 않아
Nan Neol Mitzi A-Na