flub /flʌb/noun 2verb 1forms 3phrases 1 noun2 •(US, informal) An error; a mistake in the performance of an action.A flub can be a slight cinematic slip-up or a major gaffe. — 1997 •(US, slang) A fold of fat. verb1 •(US, informal) To goof, fumble, or err in the performance of an action. formsflubbed · flubbing · flubs Phrases with flub flub upTo flub; to botch or mess up.
