What is the meaning of bumble?

verb

• Make a mess of, destroy or ruin.
  • usage: "I botched the dinner and we had to eat out"; "the pianist screwed up the difficult passage in the second movement"
  • synonyms: botch, bodge, 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
• Walk unsteadily.
  • usage: "The drunk man stumbled about"
  • synonyms: stumble, falter
• Speak haltingly.
  • usage: "The speaker faltered when he saw his opponent enter the room"
  • synonyms: stutter, stammer, falter