A. - Immense pain you get when hit in the balls.
B. - A description for a really fit girl - i.e. she is giving you an erection, hence knobthrob.
B. - A description for a really fit girl - i.e. she is giving you an erection, hence knobthrob.
Bloke 1: AARGH! Bloke 2: Ooh, that must be a real knobthrob!
Bloke 1: Damn, that chick is a knobthrob.
Bloke 1: Damn, that chick is a knobthrob.
by Nuggenheim November 29, 2007
Get the knobthrobmug.