BUNG

bung, spile

(noun) a plug used to close a hole in a barrel or flask

bung

(verb) close with a cork or stopper

tip, fee, bung

(verb) give a tip or gratuity to in return for a service, beyond the compensation agreed on; “Remember to tip the waiter”; “fee the steward”

Source: WordNet® 3.1

Etymology 1

Noun

bung (plural bungs)

A stopper, alternative to a cork, often made of rubber used to prevent fluid passing through the neck of a bottle, vat, a hole in a vessel etc.

A cecum or anus, especially of a slaughter animal.

(slang) A bribe.

The orifice in the bilge of a cask through which it is filled; bunghole.

(obsolete, slang) A sharper or pickpocket.

Verb

bung (third-person singular simple present bungs, present participle bunging, simple past and past participle bunged)

(transitive) To plug, as with a bung.

(UK, Australian, transitive, informal) To put or throw somewhere without care; to chuck.

(transitive) To batter, bruise; to cause to bulge or swell.

(transitive) To pass a bribe.

Etymology 2

Adjective

bung (not comparable)

(Australia, NZ, slang) Broken, not in working order.

Etymology 3

Noun

bung (plural bungs)

(obsolete, UK, thieves' cant) A purse.

Source: Wiktionary

Bung, n. Etym: [Cf. W. bwng orfice, bunghole, Ir. buinne tap, spout, OGael. buine.]

1. The large stopper of the orifice in the bilge of a cask.

2. The orifice in the bilge of a cask through which it is filled; bunghole.

3. A sharper or pickpocket. [Obs. & Low] You filthy bung, away. Shak.

Bung, v. t. [imp. & p. p. Bunged; p. pr. & vb. n. Bunging.]

Definition: 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).

Source: Webster’s Unabridged Dictionary 1913 Edition