Is a Man you don't want to cross he will stomp you out and piss on you. Although females refer to this as when the man they just gave head to had his Dick in another woman's Pussy!
He did the dirtyMarc to that guy last night in a fight. That's female just got dirty Marc, I know she could taste it!
when your preforming anal sex and you pull your dick out to see a gapping asshole. You then spit in it and then suck your spit out as the asshole is tighten up.
marc put his dick in a white girls ass then spit in it and sucked it out. The Dirty Marc