muck up in WordNet English dictionary

1. make a mess of, destroy or ruin
   "I botched the dinner and we had to eat out"; "the pianist screwed up the difficult passage in the second movement"
   botch  bodge  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  foul up  mess up  fuck up 
   
2. soil with mud, muck, or mire
   "The child mucked up his shirt while playing ball in the garden"
   mire  muck  mud  muck up 
   

muck up in English Wiktionary