WordWeb Online

1. Make a mess of, destroy or ruin
   "I loused 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, foul up, mess up, butcher, goof up [informal], cock up [Brit, informal], balls up [informal], make a hash of [informal]

Derived forms: lousing up, loused up, louses up

Type of: fail, go wrong, miscarry