fuckup n 1: someone who makes mistakes because of incompetence [syn: {bungler}, {blunderer}, {fumbler}, {bumbler}, {stumbler}, {sad sack}, {botcher}, {butcher}] 2: an embarrassing mistake [syn: {blunder}, {blooper}, {bloomer}, {bungle}, {foul-up}, {flub}, {botch}, {boner}, {boo-boo}]