To shag, or indeed attempt to shag, a fat person's navel.

Not to be mistaken for the much loved pink/white marshmallow treat. Although it is not inconceivable to try and combine the two.
Get a load of her! Get me a night of flumping in there i reckon.
by The Jolly Mr Poo November 15, 2010
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The action of letting out your gut after the fine chick has just walked by.
by bread infection December 5, 2009
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(noun)
A wet fart, usually the noise accompanying a follow through.

(verb)To flump
The act of flumping
Ok, own up, who did a Flump??

I flumped and had to change my underwear
by the dreamster January 21, 2004
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A flump (fl-uh-mp) is generally used to describe a woman, whom at first glance, is considered to be very unattractive/ undesirable, ugly, disgusting, and mostly someone whom you would not sleep fuck with. However at a second glance, nearly immediately after the first glace/ initial reaction, you have a sudden realization that you would indeed still have sex with her and/or "wouldn't kick her out of bed".
"That girl last night was a Flump for sure ."
"Your sister is a Flump surrounded by trash ass bitches."
by SICINFESTATION March 3, 2018
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A phony baseball metric which is an acronym for Femoral Leverage Under Max Pressure.

Many genius baseball minds within the league use FLUMP, as a way to discern which pitchers which eventually become injured or innefective throughout the course of a season, or a career.

Mike Rizzo, Billy Beane and Rick Peterson are a few FLUMP's largest proponents.

It is the most esoteric of all the sabermetrics to be sure.
Billy Beane did not feel that Bartolo Colon's upcoming free agency would warrant a new extension due to Colon's rapid decline in FLUMP. Lack of femoral leverage results in a lack of dollars offered within the Sabermetrician's inner circle.
by Heinrich138 November 22, 2015
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A word that means more than love. The truest form of endearment.
I Flump you. I Flump you with all my heart.
by Dante6969 February 28, 2018
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The iteration in which you have fumbily thrown a ball or small object to the point it goes nowhere near the target location.
I would have been able to save him, but my partner flumped the med kit.
by The Instightful Orange December 27, 2016
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