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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!
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Dude Piston

The Cock, Penis, Pork steeple, Quiver bone.
"Power drill the yippee bog
With the dude piston"

BLOODHOUND GANG'S
Foxtrot Uniform Charlie Kilo
Dude Piston by Jacob The Awsomest September 2, 2005

Detroit Piston 

A Detriot Piston is when a male takes both of his hands, balls them into a fist and fists both the asshole and cunt of a female simultaneously. It is also optional to have another female in the background perfroming a rimjob on the male, but the extra female can be substituted for a dog. As the girl is orgasming, he must yell "DEEEE-TROOOOIT BASKETTTTBALLLLL!!!!!"
that Detroit Piston last night was the bomb.com

dude piston

Power drill the yippee bog with the dude piston
dude piston by Tanner Rocks November 16, 2005

dirty piston

When 2 guys shake hands and a third guy puts his penis in between the hands of the first two shaking thus making the hand shaker jack him off
I just got a dirty piston from those guys.
dirty piston by Beaverdog February 7, 2020

Detroit Piston (pissed in) 

The act in which the male participant urinates directly into his female counterparts mouth, which she is not allowed to swallow. He then proceeds to face-fuck her in her urine filled mouth, with the ferocity of an automobile piston. This ideally occurs while the man is wearing a Chauncey Billups jersey.

Optional: When urinating in her mouth, go for the "3 point shot" by taking a few steps backwards for extra distance and accuracy (just like Chauncey).
Sarah: How was the game, babe?
Derek: Great! Chauncey Billups scored 35 points!
Sarah: Oh, that's awesome, hunny!
Derek: But no points were as big as this one. Open your fucking mouth you dirt-whore!
Sarah: Oh my! Why?
Derek: Because you are asking for a piston pump, you half-retarded hooker!
Sarah: Well, ok... (opens mouth and gets on knees)
Derek: How d'ya like theeat! (urinates in mouth) Hold it! Hooold it! Don't swallow! (proceeds to "Piston Pump" her mouth) Congratulations, you are now a "Detroit Piston (pissed in)"!

Double piston 

When a man or woman puts both of there fists inside a butthole or vagina and moves in conjunction While one fist moves down the other goes up. Like a engine piston.
I was screwing my wife last night and decided to give her the double piston elbows deep.
Double piston by Irishrover18 January 12, 2017