Top Definition
Someone who is completely useless, a loser (generally unemployed). Also, the head of the penis.
That boyfriend of hers is a real cock knob.
My wife just finished polishing my cock knob.
by R.W. Dorcey May 10, 2007
The act of using your penis to open a closed door
Guy-how did you get in?
Guy2- I Cock knobed the door.
by Fuzzy man May 29, 2016
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