1) Anus 2) Cask opening 3) Exclusively Anglo word 4) Exclusively Saxon word 5) Hole 6) Slang for to sodomize 7) Slang for the anus 8) Type of container 9) Used to fill or empty it 10) Vulgar slang for anus 11) Word with Anglo-Saxon origins 12) Word of purely Anglo origin 
A hole in a barrel, keg, or cask from where liquid is drawn.
A bunghole or bungehole is a hole bored in a liquid-tight barrel to remove contents. The hole is capped with a large cork-like object called a bung. Acceptable usage include other access points that may be capped with alternate materials providing an air- or water-tight access to other vessels. For example a bunghole on a combustion chamber can be...
• (n.) See Bung, n., 2.
The hole in the side of a wine barrel through which the barrel is filled and emptied.
Bung'hole` noun See Bung , noun , 2. Shak. 
Bunghole is slang for the anus.
[n] - a hole in a barrel or cask
noun a hole in a barrel or cask; used to fill or empty it
A hole in a barrel, keg, or cask from where liquid is drawn.
The hole in the side of a wine barrel through which the barrel is filled and emptied. In barrel manufacture, coopers always use at least one very wide barrel stave (the bung stave) somewhere in the group of staves making up the circumference of a barrel. The bung stave has to be wide enough to allow boring the bunghole without affecting the strengt...
a hole in a cask through which it is filled.