The act of forcibly taking a cock into one's hand and jacking it up 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?
Jeb: Ha! Both.