From The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]
To bung up, to use up, as by bruising or over exertion; to exhaust or incapacitate for action. [Low] [1913 Webster]
He had bunged up his mouth that he should not have spoken these three years. --Shelton (Trans. Don Quixote). [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Bung \Bung\ (b[u^]ng), n. [Cf. W. bwng orfice, bunghole, Ir. buinne tap, spout, OGael. buine.] 1. The large stopper of the orifice in the bilge of a cask. [1913 Webster]
2. The orifice in the bilge of a cask through which it is filled; bunghole. [1913 Webster]
3. A sharper or pickpocket. [Obs. & Low] [1913 Webster]
You filthy bung, away. --Shak. [1913 Webster]