the area inside the anus
specifically the final run of the colon or small intestine.
passage commonly used by arse pirates
and butt monkeys alike.
"help me doctor your forceps are stuck in my anal cavity"
simply enough, your bumhole.
I asked Ben how many fingers he could fit up his anal cavity.
The anal cavity is what legendary internet superstar prankster Tyrone Biggums would teabag.
Imma teabag your anal cavity.
The cavities you get in your teeth from eating too much ass hole.
Your teeth rot out of your mouth because you've been eating too much ass hole. "Yo James, did you hear Mary got an anal cavity, I heard all of her teeth fell out of her mouth after her anal feast."
The awesome crevice right outside of a girls anus. Caused when the pants are really wedged up there....
"wow her pants were up there pretty far, I could see her anal cavity as well as her camel toe"