Verbs

(v)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 upmake 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”
(v)stumble, falter, bumblewalk unsteadily, tripping repeatedly“The drunk man stumbled about”
(v)bumble, stutter, stammer, falterspeak haltingly“The speaker faltered when he saw his opponent enter the room”