Pliston 

A sexual act in which the male cums on the female (or other male) and onsight of his cum, he barfs on the partner....then for finishing touches he urinates on his sexual partner. The final combination of all the excrements result in what is known as a pliston.

Last night I gave Brandon a pliston all in his mouth

Pliston by Raja Saldana December 21, 2010

Pistonheads 

Right wing club for angry old white men.

I hear climate change is all made up?
What?
Yes I heard it from turbobloke on pistonheads.

Pistonheads by dokic November 7, 2019

Pistonheads 

Once a great online community now taken over by brexit loving racists and gammons.

Hey! I haven’t seen you on pistonheads recently.

I know it’s just horrible old twats on there nowadays.

Pistonheads by dokic December 13, 2022

Scissor Piston 

Similar to female on female scissoring, a Scissor Piston is the sexual act of two MALES scissoring. During the sexual act, each male interlocks taints and has his penis inserted into the other’s rectum while making a pumping piston action.

I walked in on a couple dudes doing a little Scissor Piston in the bathroom at the rave Friday night. They were squeezing each other’s nut sacks like turkey basters as they pumped away!

Scissor Piston by Panama Pucker April 9, 2022

skin piston

A person that has sex in return for a Happy Meal.

She proposed the skin piston with a burger, fry, and a small drink.

skin piston by Ronbo1977 October 12, 2011

The Dutch Piston 

Not to be confused with the heterosexual Dutch Rudder The Dutch Piston is delivered in two methods beginning with the Four Stroke Method: It begins with two men placing the ends of their penises together while gripping losely on their foreskins. The two uncontrollably begin rolling their foreskins over the adjacent penis in an alternating fashion. Thus creating a pleasurable piston like motion.

The Two stroke Method: “This method is similar to the Four Stroke Method.” It is accomplished when one man rolls his foreskin over the other mans penis while in a stationary position. The inconsiderate stationary man most likely has both hands on his lower back, knees slightly bent and has a large enthusiastic grin on his selfish face.
The two methods are calculated in RPMs not unlike a piston in an engine. RPMs in this case are defined as, “Rolls Per Minute. Although the Two Stroke method is unscientifically rated for higher RPMs, the Four Stroke Method is and always will be beneficial for both parties.

First Used in a sentence: Year 2017. Origins unknown but, most likely common at Antifa gatherings and historically between Spartan man couples as a last chance of ecstasy before dying in war. They were into all kinds of weird shit.

What began as a surprise party at a local hotel dining room was swiftly interrupted when two men where caught engaging in The Dutch Piston behind the coat check counter. Both men with intense focus and enthusiasm did not disengage until the Police arrived. Surprise!

The Dutch Piston by Breakfast at Denny’s November 29, 2017

pistonswin 

pistonswin is a member of the Basketball GM multiplayer league BGMDL. He is famously known to negotiate wild trades, getting himself fleeced, and the only member of the league under 12 years old to ever make the Playoffs. Pistonswin is an avid Detroit Pistons fan and lives in Michigan.

Damn, pistonswin just got fleeced!

pistonswin by Tim-Duncan21 August 12, 2018