The act of sticking a cucumber with a small hole into the vagina of a woman. Then while it is inside the woman you simply fill the hole with semen. Once this has been fulfilled you leave the cucumber in so that it will ferment into a pickle. With said pickle you give it to a person named Marcel.
Guy 1: Hey do you know what would be absolutely hilarious??
Guy 2: No, tell me what you are thinking.
Guy 1: We should do a Dirty Marcel
Kool aid guy: Oh yeah!
When you go to that party and hook up with that crazy bitch who, after giving you a pleasant yet rough hand job, shits on your hand wherein you proceed to fist her loose vagina with your shitty hand while screaming your ex girlfriend/wife's name.
Guy 1: "Yo I heard things got real weird last night at that party."
Guy 2: "Yeah...... I gave that Dunkin Donuts bitch Stacy the old 'Dirty Marcello'."
Guy 1: ".....She shit on your hand and you fisted her screaming your ex girlfriends name? You realize she was 14 right bro?"
Sexual: When your ass is being fingered by a person with long hair and it's dark, without realising there is shit on your finger you rub it in your hair.