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1. Make a mess of, destroy or ruin
   "I messed up the dinner and we had to eat out";
   - botch, bodge [Brit, informal], bumble, fumble, botch up, muff [informal], blow, flub [N. Amer, informal], screw up [informal], spoil, muck up [informal], bungle, fluff [informal], bobble [N. Amer], mishandle, louse up [informal], foul up, butcher, goof up [informal], cock up [Brit, informal], balls up [informal], make a hash of [informal]
    
2. Disturb the smoothness of
   "mess up the surface of the water";
   - ruffle, ruffle up, rumple
    
3. Make a mess of or create disorder in
   "He messed up his room";
   - mess

1. Something badly botched or muddled
   - cockup [Brit, informal], botch-up [Brit, informal]

Derived forms: messing up, messed up, mess-ups, messes up

Type of: disarrange, disarray, disorder, error, fail, fault, go wrong, miscarry, mistake