get off itSee: COME OFF IT.
{v. phr.}, {slang} Stop pretending; bragging, or kidding; stop being silly. - Used as a command.
"So I said to the duchess..." Jimmy began. "Oh, come off it," the other boys sneered. Fritz said he had a car of his own. "Oh, come off it," said John. "You can't even drive."/ [TahlilGaran] English Idioms Dictionary ▲