Poop-knuckle

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.

See shocker


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