The Collaborative International Dictionary of English v.0.48:
mess-up \mess-up\ n. Something badly botched or muddled. [British] Syn: ballup, balls-up, cockup. [WordNet 1.5]WordNet (r) 3.0 (2006):
mess-up n 1: something badly botched or muddled [syn: ballup, balls- up, cockup, mess-up]