When you put a fist in someone's ass and open your hand as wide as possible. This is also known as a "Staten Island tsunami"
I was fisting my girlfriends ass and decided to go for the flumper.
by TbagMartin March 23, 2010
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This word is a portmanteau of 'flabby' and 'dumper'. A flumper generally occurs when an obese person loses most of the excess weight, but the posterior retains its obesity, resulting in an average or even slim individual with a backside that sags grotesquely.
"She was damn hot when she was walking toward us, but after she passed by, I looked over my shoulder and saw she had a terrible flumper."
by Hellzapoppin' May 29, 2019
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when a said women, usually a skank, gives you head while you are taking a shit.
Damn man, jane gave me one of the best flumpers I have ever had!
by Paul Hanes April 7, 2005
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The act of giving head whilst the man takes a shit.
I couldn't tell what felt better bustin out that ass brownie or the blowjob my girl was giving me, like Hannah Montana said, "gettin a Flumper is the best of both worlds"
by Forb-Z August 12, 2010
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A flumper is someone who breaks wind a lot.
what a flumper!!
Travis you little flumper!
by Mark, Nic, Rach, Katie March 17, 2005
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"You're a tree hugging, dirt worshipping dick flumper."

"I know man, I just want peace, love and a penis in my butt."
by MsVodkaaa December 11, 2012
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the single most offensive phrase ever construed in the english language, though easily the most bad ass.
Noun
1.a phrase referring benevolently toward men who get a lot of action from women
2. a phrase to describe the most pathetic forms of life

verb (cunt flumping)
3. the act of flumping a woman's vagina
4. lolygagging or acting like an overall douche bag
1. I heard he got with jessica alba. that guy is a cunt flumper
2. I fucking hate that cunt flumper
3. That bitch was a prude until i gave her a good cunt flumping. Now u may know her as jenna jamesson
4. Nick Carter really needs to stop cunt flumping... that fucking douche bag
by geturledout November 21, 2007
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