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The sexual act of thrusting objects in and out of a ladies Front Bottom or rusty bullet hole or the aforemantioned of a man. Can be a act of self particpation or shared with a partner of group.
Michael was keen to experiment in the bedroom department. Jane too. Although the act of pumping will not be revisited after Jane returned the compliment.
pumping by WaterBoy June 19, 2006

Pumping Gas 

The action of masturbation.

Can be done to one's self, such as pumping your own gas, or have it done by another, in the action of having your gas pumped.
After she left me for another guy, I had to go back to pumping my own gas to shitty porn.

Last night this chick was pumping my gas, no questions asked.

Pumping gas, we all do it at soome point.
Pumping Gas by ives1337 August 10, 2010

fist pumping 

1.The art or act of engaging in clenching, then rasing one fist or both fists, and pumping them rythmically or out of beat to house/techno music. Variations include the side to side tricep pump and the double cross over forearm pump.
2. Going out to a social environment where this type of behavior is acceptable and the norm.
1.Bro.Fuhfugingetaboutit..once "You Don't Appreciate Me" came on at D'Jais..I was nonstop fist pumping all nite bro.
2 Cuz..Me and my crew went fist pumping at Bliss in Clifton Fri nite. Cuz..You hadda see da broads up in that joint.Owwwwee
fist pumping by BigWillyXL August 9, 2008

Pumping out the bisquick 

Masturbation, whacking it, blowing your load, jerking off, milking the lizard, cumming, pouding your pud, jizzing, strokin it, spanking the monkey, flogging your molly, paddle the pickle, wanking, rubbing one out, the big O, playing the skin flute, making toilet babies, releasing the kraken, jacking off, choking the chicken, shooting your pistol, beating the bishop, bust your nuts, jerkin the gherkin, getting your rocks off, slaying the dragon
Its best to start your day off right, getting a good nights sleep, eating a big breakfast and pumping out the bisquick

fist pumping 

A ridiculous,inane activity which only tools and people from the Jersey Shore find exciting.
Me: Dude, last night was awesome. I got gang raped by every Playmate of the year from the last decade.
Jesrsey Tool:That was nothing,I was at the club fist pumping 'til the sun came up!
fist pumping by takeout boy May 25, 2010
Plumming is where an alpha human grasps a plum firmly and shoves it hard into someone’s arse so their anus starts bleeding and they start urinating
Oh my fuk Keiths had a plumming
Plumming by Clitflab July 9, 2019