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Verb: louse up
  1. Make a mess of, destroy or ruin
    "I loused up the dinner and we had to eat out";
    - botch, bodge [Brit], bumble, fumble, botch up, muff, blow, flub [N. Amer], screw up, ball up, spoil, muck up, bungle, fluff, bobble [N. Amer], mishandle, foul up, mess up, butcher, cock up [Brit], goof up, balls up

Derived forms: lousing up, loused up, louses up

Type of: fail, go wrong, miscarry