triple piston

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.

Looks like a triple piston kind of night.

by triple piston December 12, 2012

Detroit Piston

When a man wants to piss inside of a woman while having sex.

I heard Ewan wants to try a detroit piston with Molly

by Mackenzie1606 June 9, 2024

Stinky Piston

Take someone who is face down ass up and lube up your arm and repeatedly punch them in the asshole until your whole fist and arm enter. After it is in, then proceed to pump your clenched fist in and out. Making your arm bend and extend having the look of how a piston works. Hence… The Stinky Piston.

If you don’t shut up, I’m gonna give you a Stinky Piston!

by EkoMiles December 16, 2023

Piston Cup

He did what in his cup?

Lightning McQueen: Doc won 3 Piston Cups!

Mater: He did what in his cup?

by UltimateDoge September 11, 2022

Sticky Piston

When you use a piece of toilet paper you had just blown your nose in to wipe your ass, hoping the mucus would act as an adhesive and pick up any particles left behind. May also be used when low on toilet paper, but desperate. Named after the Minecraft object.

Barry was unfortunate enough to have both the cold and the flu at the same time, and when low on toilet paper, resorted to the Sticky Piston to kill two birds with one stone.

by Ogre man November 20, 2021

jizz piston

slang for penis

That bloke's got a nice looking jizz piston.

by m_step March 15, 2021

Pistoning

piss-ton-ing
(verb)

Rapid back and forth motion contained within the ass (closed first or otherwise) without removing the hand.

(see also: Fisting)

Him: So, how do you like to get fisted?
Me: Pistoning is my favourite! Piston my hole so fast until I cum without jerking off.

by PureTea January 9, 2023