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!"