What is Knuckle Butter?
1.
Noun, the slimy substance that seeps out from between the fingers of a closed fist after a person has ejaculated in their own hand.
Jack used a tissue to wipe the knuckle butter off of his hand after he jacked off.
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1.
Any kind of whitehead, blackhead, etc. located on or near the vagina.
Tiffany wore shorts over her bikini to conceal the large pussy pi..