A person suffering from or subject to coprolalia, the obsessive and uncontrollable use of scatological language. (Compare with such like back-formations as insomnia and insomniac; hypochondria and hypochondriac; coprophagia and coprophagiac; coprophilia and coprophiliac).
The "jailin' it" droopy-drawers doofus was a COPROLALIAC: he suffered from "the Black man's disease", the utter inability to assemble even the simplest English sentence without lavishly larding his utterances with a plethora of "fuckers", "motherfuckers", "motherfucking", . . . and, well, you get the picture. It was almost as if "motherfucker" was the only word he knew and he was bound and determined to make the most of it -- as a noun, a verb, an adjective, an adverb, an imperative, and, of course, as an interjection! Yeah, good ol' Droopy Drawers, he's cheesin' it as he's sleazin' it -- he's a real kool kitty, a regular "copro-cat".