When two people are standing facing each other, usually celebrating an event, and one goes in for a high five and the other goes in for a fist bump and their hands collide in a dissapointing way
"I was going in for a fist bump, and he thought we were going to high five, so we just kind of.... flumped. "
by ArmyInfantry11B September 18, 2016
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Northern English term for the bulge in the gusset of a females knickers (flump). Sometimes referred to as a camal toe.
'Wow, look at her flump

'She's a flump like a boxers glove'
by Daily flumper January 3, 2019
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The act of two obese people having sweaty, fatty sex. Generally accompanied by the flat sound of skin flapping against skin, as well as by general walrus-like bellowing.
"Dude, I couldn't sleep at all cause my roommate was flumping that fat chick all night long"
by yagoah April 22, 2009
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1.'V' The nearly boneless collapse of a young animal, especially a puppy, when they run out of energy after an energetic play session. This is a cross between a flop and a slump.

2. 'N' Someone who performs a similar activity, for example collapsing on a chair or couch after a long day.
The Newfoundland puppy flumped onto the tile floor. After an all night poker party, John was nothing but a flump.
by Mad Doc G March 8, 2009
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To spread yourself out and not bother to move again at a sleepover on the floor with desired bedding. Flumping is best performed in a sleeping bag against another body in a sleeping bag and a second body flumping on a sofa with a quilt.
Boz flumped against Roz and Sauron.
'Stop flumping on me - I can't feel my leg!'
by Roz February 15, 2004
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An overweight woman who is addicted to sex.
That flump crushed me last night!
by KL June 29, 2003
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