What is Mule Knuckle?
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Is the equivalent of a camel toe, but for guys. When your shorts or jeans ride up your crotch and you can see your nuts making a distinctive shape similar to that of a mules knuckle.
"Look at that guy sitting over there, he totally has a mule knuckle right now"
See
Random Words:
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weird old man saying "sploodie doodie doo!"
hey thats nooby sploodie doodie doo!
See sploodie doodie doo!, lol, =), =), >..