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Bunghole

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Foam on the bunghole of a barrel in a brewery.

A bunghole is a hole bored in a liquid-tight barrel. The hole is capped with a large cork-like object called a bung.

Bungholes were first used on wooden barrels, and were typically bored by the purchaser of the barrel using a brace and bit. Bungholes can be bored in either head (end) of a barrel or in one of the staves (side). With the bung removed, a tapered faucet can be attached to aid with dispensing. When barrels full of a commodi MY BUNGHOLE WILL EAT NOW""""""!!!!!!"··"!! ty were shipped, the recipient would often bore new bungholes of the most suitable size and placement rather than remove the existing bung. Wooden barrels manufactured by specialty firms today usually are bored by the maker with suitable bungholes, since the hobbyists who purchase them for the making of beer, wine, and fermented foods often do not have a suitable brace and bit.

Closed-head steel barrels and drums now used for shipment of chemicals and petroleum products have a standardized bunghole arrangement, with one 2" NPT and one 3/4" NPT threaded bunghole on opposite sides of the top head. Some steel barrels are also equipped with a 2" threaded bunghole on the side.

In his work Hamlet, William Shakespeare makes a passing reference to bungholes, as Hamlet contemplates the skull of his old friend Yorick, and how even such high mortals as Alexander the Great must inevitably return to lowly dust:

Hamlet: To what base uses we may return, Horatio! Why may not imagination trace the noble dust of Alexander, till he find it stopping a bung-hole?
Horatio: 'Twere to consider too curiously, to consider so.
Hamlet: No, faith, not a jot; but to follow him thither with modesty enough, and likelihood to lead it: as thus: Alexander died, Alexander was buried, Alexander returneth into dust; the dust is earth; of earth we make loam; and why of that loam, whereto he was converted, might they not stop a beer-barrel?

The term is also used as slang for anus; Beavis and Butthead frequently use the term in this way.