The anatomical marvel when a human being has his or her knees located in his or her butt.
The baseball team sat down when they were told to take a knee; they must have buttknees.
by Walker Ward March 22, 2012
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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"
by BussyBaka69 January 7, 2022
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