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1.
An idiot.

A famous modern-day pirate ship which seats no more than 2 men at any given time.

The name of the Captain of the ship bearing the same name.
That Chumknuckle just shit his pants.

by EvilJam September 13, 2006
 
2.
what one gets when they are finger-banging a woman who has a fishy-smelling vagina
i was ready to go down on her, but had to check out the goods first. i couldn't eat her out b/c her pussy gave me chumknuckle.
by WeezieCletusBBH May 20, 2009
 
3.
1. An idiot or moron
2. Someone who is clumsy.
Did you hear what she said? She is such a chum knuckle!
by XTO June 18, 2010