What is the meaning of bumbling?

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, 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
• Walk unsteadily.
  • usage: "The drunk man stumbled about"
  • synonyms: stumble, falter, bumble
• Speak haltingly.
  • usage: "The speaker faltered when he saw his opponent enter the room"
  • synonyms: bumble, stutter, stammer, falter

adjective

• Lacking physical movement skills, especially with the hands."a bumbling mechanic"; "a bungling performance"; "ham-handed governmental interference"; "could scarcely empty a scuttle of ashes, so handless was the poor creature- Mary H. Vorse
  • synonyms: bungling, butterfingered, ham-fisted, ham-handed, handless, heavy-handed, left-handed