A rare and highly sought after aftermarket mod for cars which adds anywhere from 100-700 HP depending on number used (i.e. Single, Dual, Quadratic). Also see Tally Pipe
by MVC March 19, 2003

Julie's such a Triscuit Pumper. After burning a bowl she got the munchies and starting humping the box.
by PumpMonkey July 29, 2011

one who masturbates; one who jerks off; one who chokes one's chicken; one who strokes one's cork while massaging one's grapes
Employee1: Man, why is the boss such a jerk?!
Employee2: Ah, don't worry dude, he's just busin' your balls cause he's a monkey pumper.
Employee2: Ah, don't worry dude, he's just busin' your balls cause he's a monkey pumper.
by Drjerkle September 22, 2009

Have you ever seen a truckie actually put out a fire? No, because that's the pumper slugs job. The truckies just stand around flexing for the camera.
by The hoseman July 28, 2011

by Netropolis March 18, 2019

by PumpMASTER3000 October 12, 2021

A person who brings hype and enthusiasm to a party, who helps break the ice so partygoers have a good time.
My university's student newspaper always had wanted ads for 'party pumpers' to work at bar/bat mitzvahs getting the kids dancing and enjoying themselves.
by sallyhousecoat February 10, 2012
