Source : Webster's Revised Unabridged Dictionary (1913)

Bung \Bung\, v. t. [imp. & p. p. {Bunged}; p. pr. & vb. n.
   {Bunging}.]
   To stop, as the orifice in the bilge of a cask, with a bung;
   to close; -- with up.

   {To bung up}, to use up, as by bruising or over exertion; to
      exhaust or incapacitate for action. [Low]

            He had bunged up his mouth that he should not have
            spoken these three years.             --Shelton
                                                  (Trans. Don
                                                  Quixote).