Dirty Skeet refers to a young mischievous and unhygienic individual.
It derives from the word Skitter, which older men or women would call a young mischievous boy or girl.
Over time Skeet replaced Skitter and Dirty Skeet came about from children coming back home unclean from playing outside.
Where's Martin?
Oh he's upstairswashing his hands, they were filthy.
When youre doing a sloppy chick from behind while shes smoking a cigarette, and you take the cigarette out of her mouth and blow some smoke up her ass. You then proceed to put out the cigarette in her ass and follow up with a nice dirty fucking.
*optional*- when you finish up, you the cigarette butte down her gaping asshole.