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

1.
да ладно тебе, перестань
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?
О, да ладно тебе, ты же не веришь в это, правда?
•
Come off it, you know that's not true.
Да ладно тебе, ты же знаешь, что это неправда.