The Collaborative International Dictionary of English v.0.48:

Bungle \Bun"gle\, v. t.
   To make or mend clumsily; to manage awkwardly; to botch; --
   sometimes with up.
   [1913 Webster]

         I always had an idea that it would be bungled. --Byron.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bungle \Bun"gle\, n.
   A clumsy or awkward performance; a botch; a gross blunder.
   [1913 Webster]

         Those errors and bungles which are committed.
                                                  --Cudworth.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bungle \Bun"gle\, v. i. [imp. & p. p. Bungled; p. pr. & vb. n.
   Bungling.] [Prob. a diminutive from, akin to bang; cf.
   Prov. G. bungen to beat, bang, OSw. bunga. See Bang.]
   To act or work in a clumsy, awkward manner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bungle
    n 1: an embarrassing mistake [syn: blunder, blooper,
         bloomer, bungle, pratfall, foul-up, fuckup,
         flub, botch, boner, boo-boo]
    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: spoil by behaving clumsily or foolishly; "I bungled it!"

Moby Thesaurus II by Grady Ward, 1.0:

101 Moby Thesaurus words for "bungle":
   bad job, bat out, be all thumbs, bevue, blooper, blow, blunder,
   blunder away, blunder into, blunder on, blunder upon, bobble,
   boggle, bollix, bonehead play, boner, boo-boo, botch, bugger, bull,
   bumble, butcher, clumsy performance, commit a gaffe, dash off,
   do anyhow, do by halves, do carelessly, do offhand, err, error,
   etourderie, fake up, faux pas, fiasco, flounder, flub, fluff,
   flunk, foozle, fuck up, fudge up, fumble, gaffe, gaucherie, goof,
   goof up, gum up, hash, indiscretion, jury-rig, knock off,
   knock out, knock together, lapse, lash up, louse up, lumber,
   make a blunder, make a misstep, mar, mess, mess up, miscue,
   mismanage, miss, miss the mark, misspeak, mistake, muck up, muddle,
   muff, murder, off day, patch, patch together, patch up,
   play havoc with, pound out, rough out, roughcast, roughhew,
   sad work, screw up, slap up, slip, slip up, snafu, solecism, spoil,
   stumble, stupidity, throw off, throw together, toss off, toss out,
   toss together, trifle with, trip, washout, whomp up