fudge dungeon
Most literally, the colon, bowel, or large intestine. Depending on context, may also refer to the anus.
Don't go in the bathroom for a while; there was a mass escape from my fudge dungeon.
Gillian is a nice girl; she just has a thing for taking it in the fudge dungeon.
Gillian is a nice girl; she just has a thing for taking it in the fudge dungeon.