Top Definition
The process of acquiring a girl's love, having your way with her in bed, and then dumping her immediately afterwards and never returning her calls.
"I thought they were watching Titanic?"
"Nah that was just an excuse so he could PumpNdump her"
by Art_1 September 26, 2007

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Another way to describe pulling out during sexual intercourse.
I took a girl home last night who wasn't on the pill so I had to do the ole pump n dump on her back.
by The Real Wiz 76 July 16, 2016

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n. The act of masturbating in a gas station bathroom while defecating.
Steve: "Dude, pull over at this gas station. It's urgent."
Jeff: "Why?"
Steve: "I need to take a Pump 'n Dump. Bad."
Jeff: "A what?"
Steve: "Look it up."
Jeff: (searches Urban Dictionary) "Oh my god that is horrifying. People do this?"
by PriceIsRight November 24, 2013

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The act of using a giant fleshlight while simultaneously taking a monumental bowel movement
Alright fine, I'll play some Mario Party. Just let me go pump n' dump first
by koonmagic November 28, 2010

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The companion technique to the blumpkin. Intercourse (usually anal) performed while the pitcher defecates is referred to as a pump n dump.
I was giving her the ol' Pump N Dump, right before I finished that shit off with a blumpkin.
by Sp0o/\/?! May 09, 2008

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