MESS UP

{v. phr.}, {slang}, {informal} 1. To cause trouble; to spoil something. * /What did you have to mess up my accounts for?/ 2. To cause someone emotional trauma. * /Sue will never get married; she got messed up when she was a teenager./ 3. To beat up someone physically. * /When Joe came in after the fight with the boys, he was all messed up./