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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.
by WaterBoy June 19, 2006
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N - The opposite of moshing. A group of guys and girls that grind and make out, sometimes going all the way in the crowd at a concert. Usually during raves.
Dude #1: I'd rather go Pumping at a concert than Moshing.

Dude #2: Dittto, better to make out with hot chicks than rub all over sweaty guys.
by Pyre Punk February 09, 2011
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when you grab the meaty part of someones upper arm like by their bicep and pump it by clenching and unclenching your hand around their arm. This should be used when someone is excited, nervous, turned on, or scared
"omg did you see that hot guy?" (pumping arm)
by gettinslizzard April 28, 2010
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1. When a club or spot is 'going sick'.
2. Fucking, rooting.
1. "The party waz pumping hardcore when we rocked up."
2. "I waz pumping her in the ass when her daddy walks in....."
by Diego September 02, 2003
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A gambling term that means you are up and winning a lot of money. Pumping feels even better when you were previously dumping.
Jackson was dumping for the first hour in his poker session, but then he started pumping once everyone thought he was a moron and they started calling him. He pumped everyone's chips away except for that sweet old ladies!
by DrDumpenstein February 18, 2011
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