louse up (
http://definr.com/louse 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, {foul
up},
mess up,
fuck up]