Someone being a complete dumb ass. Not brite. Says repeated dumb remarks.
Dude why did Bob stick his dick in the fuel tank? Hes a complete knuckle dick.
by rail-a-bitch February 08, 2009
someone who gets cockpunched all the time
Andrew Baker is so well hated that he became a knuckledick.
by DLa November 15, 2003
Someone who gets cockpunched all the time.
He walks funny because he is a knuckle-dick.
by Monkey D November 16, 2003
A penis that has "popped" or made a popping sound similar to knuckles popping after being thrusted in too hard, resulting in a bent penis and pain
Dude the other night I was with my girl and went too hard and got a knuckle dick.
by Dr. F the mad scientist December 22, 2015