What is Poop-knuckle?
1.
The second knuckle in (heading towards the hand). Originating from the knuckle at which you stop at when inserting a digit into another's asshole.
Used to warm up/stretch out an asshole before anal sex.
I was playing ping-pong and the ball hit off my poop-knuckle.
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Random Words:
1.
A person or object that may be considered extremely gay and or faggish in nature.
If a person is letting thier backpack slut all over ..