Source : WordNet®

mess up
     v 1: 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},
           {screw up}, {ball up}, {spoil}, {muck up}, {bungle}, {fluff},
           {bollix}, {bollix up}, {bollocks}, {bollocks up}, {bobble},
           {mishandle}, {louse up}, {foul up}, {fuck up}]
     2: disturb the smoothness of; "ruffle the surface of the water"
        [syn: {ruffle}, {ruffle up}, {rumple}]
     3: make a mess of or create disorder in; "He messed up his
        room" [syn: {mess}]