Definition of bunghole in English:

bunghole

noun

  • An aperture through which a cask can be filled or emptied.

    • ‘To get the juice through the bunghole, a device like a small half cask with a tube on the bottom termed a tundish or tunpail was employed as a funnel.’
    • ‘In Old French oeiller was to fill a cask to its eye or bunghole - to the eyeballs, as you might say.’
    • ‘It sounds obscene, but it's the short form of Ungespundetes, a beer matured in barrels with open bungholes so the fermentation fizz escapes.’
    • ‘If you're using a barrel, fill it to within an inch of the bunghole.’

Pronunciation:

bunghole

/ˈbʌŋhəʊl/