SCREW UP

{v. phr.}, {slang}, {semi-vulgar}, {best avoided} 1. To make a mess of, to make an error which causes confusion. * /The treasurer screwed up the accounts of the Society so badly that he had to be fired./ 2. To cause someone to be neurotic or maladjusted. * /Her divorce screwed her up so badly that she had to go to a shrink./