The sound created when a man thrusts his penis into a tight, well lubricated vagina. Also known as vulva volume.
Man, pumping that dirty bird I picked up last night, her pussy was so wet the pussy piston action was phenomonal. I swear she was running some Penzoil grade shit.
by Geezer81 March 25, 2007
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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)"!
by Brad Delp April 11, 2008
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Application of aerosol deodorant with a blast under each armpit followed by a slash across the chest.
Come on, dude, we're going to be late to meet the chicas. Finish getting dressed and let's go!

Okay, just a quick double piston chesty and I'm ready.
by rickbrunernyc August 03, 2009
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Noun. Term for penis. Usually used to imply an imposing girth.
You let Todd put that lubed up meat piston in you? Shit!
by Hrontajkpa December 18, 2009
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When a sexy brunette gives you an amazing blowjob until you cum in her mouth, she then swallows it and licks her lips
My girlfriend gave me a piston job lastnight it was amazing

You lucky bastard
by Barbay February 21, 2017
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