What is Butt-nut?
1.
One who is nuts for butts, that is, an anal sex enthusiast. Can refer to straight or gay people, though it is likely to be taken as offensive when used to describe a gay person.
Remember that girl I started hooking up with at the party? Turns out she's a total butt-nut. Fortunately, she's really anal about personal hygiene.
2.
1. an abnormality of a hermaphodite, that has a testicle growing out of their anus.
Hey, Look at that guy in the thong! Is that a bad case of hemmroides or what?
No, It just has a butt-nut.
3.
the clumps of human excrement found on arse hairs. they cling to the hairs forming clumps,known as butt nuts. they occur when the bumhole has not been properly wiped with toilet paper.
oh no i have got a load of dried shit around my arse, they are sticking to my arse hairs. i hate butt-nuts!
See
4.
When a man cums in someone's anus
I had to
take a dump to get rid of the butt-nut.