come off it! idiom informal
谁信呢！得了吧！别胡说了！别瞎扯了！
used to tell someone that you do not believe what they are saying is true, or that you strongly disagree with them
Ask Simon to cook the meal? Come off it, he can hardly boil an egg! 叫西蒙去做饭？别瞎扯了，他连煮个鸡蛋都不会！