WordWeb Online

1. The complete mismanagement or mishandling of a situation
   "a typical bureaucratic screwup";
   - screw-up [informal]

1. [informal] Make a mess of, destroy or ruin
   "the pianist screwed up the difficult passage in the second movement";
   - botch, bodge [Brit, informal], bumble, fumble, botch up, muff [informal], blow, flub [N. Amer, informal], spoil, muck up [informal], bungle, fluff [informal], bobble [N. Amer], mishandle, louse up [informal], foul up, mess up, butcher, goof up [informal], cock up [Brit, informal], balls up [informal], make a hash of [informal]
    
2. [informal] Make more intense
   "Emotions were screwed up";
   - heat up, hot up [Brit, informal]
    
3. Screw or turn higher
    
4. Twist into a strained configuration
   "screw up one's face"

Derived forms: screwed up, screwups, screw-ups, screwing up, screws up

Type of: compound, deepen, fail, go wrong, grimace, heighten, intensify, make a face, miscarry, misdirection, mismanagement, pull a face, screw