come off it
US /kʌm ɔf ɪt/
UK /kʌm ɔf ɪt/

1.
그만해, 말도 안 돼
used to tell someone that you do not believe what they are saying, or that you disagree with it
:
•
Oh, come off it, you don't really believe that, do you?
오, 그만해, 정말 그걸 믿는 건 아니지?
•
Come off it, you know that's not true.
그만해, 그게 사실이 아니라는 거 알잖아.