The result of an improper angle of approach when wiping your ass from a particularly messy poop-session. Poop gets on your knuckle. Usually occurs when you lift a cheek to the side and attempt a wipe.
Steve liked to lean to the left when he wiped his ass. This often resulted in a nastycase of poop knuckle.
The part of susi that chigger likes to see. A harlot type creature that stalks the night wearing netted stockings and gay boots. Has extremly smug tendencies and is far superior too all other humans. Hair styled like that of sonic the hedgehog. Has weird obbsession with childrens toys.
The cluck knuckle will come sit on your head and hatch your eyes out.