Knubbin 

Knubbin (pron NUB - IN)

The bump formed in your fly while sitting down caused by your zipper. Sitting down causes looseness in the material surrounding the fly and the less flexible zipper, velcro, button, etc, forms into a funny shaped lump.

Ted: Hey look, Fred's got a boner! Haha!
Fred: Na way man, it's a knubbin

Knubbin by Aceramic May 29, 2009

Knobbit 

A penis that is small in both girth and length, but is abnormally hairy.

Apparently, **** has a knobbit

Knobbit by The Gun Penguin December 1, 2014

Knobbit 

A rare breed of animated dick found only in closets and porn star drawers. It is a cross between a knob and a hobbit. It is also known as the Halfthing. Sexual encounters with it are usually fatal. Noted for an extreme fondness for Jews; one of the biggest little-known factors for low population of Jews in the world.

"I banged a knobbit!" Berg Bergson Bergman, Jew Supreme, Last Words.

"There's not a Jew to screw left!" Akaman Bangaman Bergson, Knobbit of the Dick.

Knobbit by fuckoffimnottellingyoumyname July 6, 2011

Knubbin 

any boner less than or equal to three inches

No way I'm hooking up with that dude - I may be drunk but I need more than a Knubbin.

Knubbin by Miss Skank October 14, 2016