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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.
by Irishrover18 January 12, 2017
mugGet the Double pistonmug.

piston pump

Slang referring to an aggressive, furious, rapid act of fellatio. The piston pump receives its name from the rapid head movement exhibited by the provider of the fellatio, which is said to resemble the action of a moving piston. This is also referred to as the jackhammer. The piston pump is much sought after in the world of fellatio and should be received with grace and humility.
Man, that piston pump was great. I have never been sucked off so furiously.
by Boozy Barfly November 11, 2008
mugGet the piston pumpmug.

german piston

the femal version of a dutch ruuder
"gosh, joe gave me a great german piston last night"
by lars fredricksen January 9, 2009
mugGet the german pistonmug.

Piston Neck

A man who has a piston as a neck and can’t stop his head from going up and down
“YOU FUCKING PISTON NECK
by TheHungryShoe September 28, 2020
mugGet the Piston Neckmug.

Piston Neck

A man who has a piston as a neck

His head can not stop going up and down because of this
“This town ain’t big enough for the both of us, you god darn piston neck”

“You fucking piston neck”

“What are ya? A fucking piston neck?!”

“Get off my land you piston neck”

Or if you are a women

“Get your willy out of my face you piston neck”

“Get off my behind, you piston neck lookin retard”

Honourable mentions

Piston Neck Pete
Piston Neck Willy
by TheHungryShoe September 28, 2020
mugGet the Piston Neckmug.

Shit-piston

When your going anal with a bitch and she shits while your dicks in her ass forcing it back out like a piston.
I was with my hoe last night and while we were doing it she pulled a shit-piston.
by Donkeykong2128 May 31, 2015
mugGet the Shit-pistonmug.

butter piston

Yet another slang term for penis. It is meant to be humorous and not as offensive as some other slang terms.
Fred : "Dude, I thought Darcy was leaving you."
John : "What can I say? She can't get enough of my butter piston."
by Huge Assman November 2, 2017
mugGet the butter pistonmug.

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