From WordNet (r) 3.0 (2006):
bumble
v 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" [syn: 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: walk unsteadily; "The drunk man stumbled about" [syn:
stumble, falter, bumble]
3: speak haltingly; "The speaker faltered when he saw his
opponent enter the room" [syn: bumble, stutter,
stammer, falter]