When a man is wearing tight pants and the crotch seperates his testicles showing a bulge on each side of the seam.
Look at that guy, his pants are so tight I can see his sack Knuckle.
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The bulge created when a mans pants ride up too high.
Dude that cowboy has to be uncomfortable. He's packin a major man knuckle.
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Fisting a girl with large vagina lips (roast beef curtains aka RBC's)
Brian ham knuckled that girls in Brugges last night.
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Dried semen. When remnant semen dries on the fingers after fapping and busting a thick nut all over the hand.
Is that dried skin on your fingers?
Naaahh. I just didn't wipe my fingers to good after fapping this morning. It's knuckle crust.
That's fuckin nasty braaaahhhhh
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Another word for nose
Dude, you have an ugly face knuckle
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When some one wipes their ass and their thumb knuckle hits their asshole before the toilet paper does, causing them to have shit on their knuckle.
Tom had to use extra soap to get off the brown knuckle.
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What happens when and older Gentleman strokes the cock, and the load doesn't fly off any more.
Bob tried to shoot sally right in her eye, but all he got a was a bit of the knuckle drizzle.
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