One who purchases and drives a used police vehicle because he's an asshole; particularly one who gets a motorcycle and wears an "official" looking helmet to go along with his cheap, crooked aviator sunglasses and cheesy, porn mustache.
All of a sudden this patrol car pulls right up on my ass, I start shoving the buds in my mouth and chewing like crazy - then I realize he's just a fuckin' cop knobbler! ... so I ran him off the road.
The act of forcibly taking a cock into one's hand and jacking itup and down whilst the mouth slides up and down the shaft in unison or opposition.
BillyBob: Where's that whore you call a girlfriend?
Jeb: Campus police caught her blowing one of her professors in the parking lot. She's down in county lockup... prolly likin' some stank-ass prison guard snatch.
BillyBob: Did they charge her with Armed Knobbery or Public Incocksuckation?
He kept smoking after developinglung cancer, because Ayn Rand said it would be immoral not to smoke in celebration of Man's mastery of fire. What a knobjectivist.