I just learned that a hole drilled in a wooden barrel (to provide access to the contents) is called a bunghole.
And now, I can't stop laughing.
I know, I'm a child: a big ole' man child.
Caption
Animation from Beavis and Butthead showing Beavis with his T-shirt pulled over his head, as he says, "I am the Great Cornholio. I need TP for my bunghole!"