1. Something badly botched or muddled
   "The presentation turned into a complete balls-up";
   - cockup [Brit, informal], mess-up [Brit, informal], botch-up [Brit, informal], stuff-up [Austral, NZ, informal]

1. Badly mishandle or ruin something
   "He ballsed up the presentation by forgetting his notes";
   - botch, bodge [Brit, informal], bumble, fumble, botch up [informal], muff [informal], blow [informal], flub [N. Amer, informal], screw up [informal], spoil, muck up [informal], bungle, fluff [informal], bobble [N. Amer], mishandle, louse up [informal], foul up [informal], mess up, butcher, cock up [Brit, informal], goof up [informal], make a hash of [informal]

Derived forms: ballses up, balls-ups, ballsing up

Type of: error, fail, fault, go wrong, miscarry, mistake