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.
See
Random Words:
1.
The person all your guy friends want to fuck when they realize she isn't just yur little sister any more- she's your little vi..
1.
See NullZilla..