Definitions by BussyBaka69

buttknee 

A spotty ass also known as buttknee, or in a more descriptive way, acne on your bum that you get from sitting down. This is caused from not smoothing your bum, some are even born with it. Name is Butt Acne

"Your ass is well spotty and bumpy you must have buttknee"

buttknee by BussyBaka69 January 7, 2022