Source : WordNet®

screw up
     v 1: make more intense; "Emotions were screwed up" [syn: {heat up},
           {hot up}]
     2: make a mess of, destroy or ruin; "I botched the dinner and
        we had to eat out"; "the pianist screwed up the difficult
        passage in the second movement" [syn: {botch}, {bumble}, {fumble},
         {botch up}, {muff}, {blow}, {flub}, {ball up}, {spoil}, {muck
        up}, {bungle}, {fluff}, {bollix}, {bollix up}, {bollocks},
         {bollocks up}, {bobble}, {mishandle}, {louse up}, {foul
        up}, {mess up}, {fuck up}]
     3: screw or turn higher
     4: twist into a strained configuration; "screw up one's face"