A fork of Rural Dictionary
When a man cums in someone's anus
I had to take a dump to get rid of the butt-nut.
When a man inserts his penis so far into a woman’s anal canal and all there is to see is the woman’s butt and mans nuts.
Me and my girlfriend made Butt Nuts last night while having sex.
its where you have your testicles surgically removed (by a doctor) and placed in to your ass cheeks to supply padding and comfort when I sit or lay
"I went to the doctors and had Butt Nuts now its less painful when I fall on my ass and more comfort when I sit down"