foul up


foul up (http://definr.com/foul up)

     v : make a mess of, destroy or ruin [syn: botch, bumble, fumble,
          botch up, muff, blow, flub, screw up, ball up,
          spoil, muck up, bungle, fluff, bollix, {bollix
         up}, bollocks, bollocks up, bobble, mishandle, {louse
         up}, mess up, fuck up]