The act of getting a boner

Not to be confused with lob on or knob off
Watching that porn gave me such a knob on
by Tom P. Cock March 31, 2006
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A game where a group of men secretly expose there individual penis' in a crowded room such as a bar and poke someone with it, at which point they shout to their friends, 'knob' s on'.
Knobs on, 5 points to me said Rich.
by Barry big bones December 24, 2016
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Amazingly cool-- in addition with other admirable traits.
He's super hot with knobs.

That concert was the best ever- with knobs.
by Marie Young September 2, 2007
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Lady: "excuse me sir, your knob is sticking out."
Man: "don't flatter yourself woman. its hanging out."
Man 2: "call that a knob?"
by simon December 24, 2003
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