n. adj. A greasy piston is a person that indulges in activity of the homosexual persuasion. Greasy coming from the chocolatey brown color of shit, and piston from the penis and it's motion in and out of another man's rectum.
by Maxieboy July 17, 2003
A term used to describe when someone is getting their dick sucked or rode by a person while they’re driving a vehicle.
“Hey, do you mind if I give you a blowjob while driving?” she said. “Oh, you mean a Pittsburgh Piston?” I responded.
“Dude, get this. She rode my dick WHILE I was driving! Ain’t that crazy?”
“Damn! That Pittsburgh Piston must’ve felt nice…”
“Dude, get this. She rode my dick WHILE I was driving! Ain’t that crazy?”
“Damn! That Pittsburgh Piston must’ve felt nice…”
by Darth826 January 28, 2025
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by InterpersonalCommunication February 21, 2025
something with pistions(also known as stmg with pistons)is the art of useing pistions to steal illigal/unobtanible blocks form a minecraft map
by godstone July 14, 2023
When a man, nude, between two females, as he is fingering both of them, one of them has a hand on his balls and the other is jerking his penis vigorously until they all get off.
by triple piston June 09, 2012
When two men or women get on all fours with their anuses pressed together and push a lubed tampon back and forth between their rectums.
by Firepants McGee November 21, 2024
by Bradyballs November 16, 2019