Knob Throbber Share definition Flag A chick (or otherwise) who gives every guy that sees them a major boner. Jenny is such a Knob Throbber, that hard-on didn't go away for hours. Knob Throbber by dickmonger March 3, 2009 0 0 Get merch Get the Knob Throbber mug. Buy Now — $32.95 See more merch