This is one word and is used to define the sack everyone has on their butt. This word is used in day-to-day conversation. (Yes I spelled the word right it’s spelled buttsac not buttsack)

A sac used to hold one's saggy butt (usually caused by being a buttslut).

Sack of Dingle Berries that is attached to ones ass crack

your nutsack more back than normal touching your asshole causing major rashing when shiting

When one mans Ball sac is deformed and located on his bum cheek.