A fat imbecile. Pun on the name Forrest Gump. Used in the popular TV show Simpsons when police chief Wiggum arrests Homer Simpson.
Homer (sitting on a park bench): Life is like a box of chocolates...

Chief Wiggum: Hold it right there Forrest PLUMP! We have laws against impersonating celebrities.
by Eddy June 27, 2007
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1. Used to describe someone who is (slightly) chubby, and as become so over the christmas/summer holiday period.
2. Or, someone who morbidly obese and you don't want to hurt their feelings, yet you stil want to bring them to the attention of their weight gain.
1. 'oh mighty me darling, you seemed to have gained ten pounds over the christmas period! Time for the old detox!'

2. 'S**t! Look at that big moma, shes ever bigger than yours!'
'Mate, shut it, be nice to her, shes my aunt'

'alright sorry, shes festively plump'

'thats better'
by Valentina Osborn July 13, 2006
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The most Fucking sexy BBW in the world.
Her belly is so squishy and squeezable.
That girl over there is such a Plump Princess
by fatty_lover69 June 12, 2012
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When those lower lips look nice and juicy, you just want to smack them to your heart's desire.
by Datnibbler June 27, 2019
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Slightly larger than average;thick, lush, as the English would say about an appealing woman. Having a fulsome chest; busty, with a booty(bubble buttpawg) and a slightly curved stomach (not a gut) with normal legs and arms. It is meant as a compliment denoting desirability. Think Jessica Simpson, Amy Shumer, Marilyn Monroe, Anna Nicole (between the playboy years and the death of a millionaire ) or Dana Delaney from the 90's show china beach or Natasha Lyonne from American pie/orange is the new black. It does not mean fat, pudgy, or far overweight as some seem to think it has come to mean.
She is pleasantly plump with curves in all the right places
by azahrarn September 3, 2016
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A term commonly used by desperate fat women looking to get laid. These plus size women like to run personal ads describing themselves as "pleasingly plump." Sure you're pleasingly plump if sitting by the Sun is comfortably cozy.
Bloody Yin-Yang: These overweight hoebags need to stop calling themselves pleasingly plump! Cute fat chicks do exist but they do NOT freaking weigh 400 lbs!

Bob Sherlock: Dude, maybe you should start looking at some skinny bitches instead. They make for good fun.
by Acid Trip2580 November 1, 2013
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(v) when one or more men go out to a club, a bar, or the local McDonalds strictly to hit on and/or hook up with fat chicks or plumpers. Plumping usually requires a wingman in order to deal with the skinny, attractive girls, but not always.
"Hey dude, me and Joe are gonna go plumping tonight, wanna come?"

"Sure, I love to go plumping, do I have to be the wingman again? I hope not."

by The_Milk October 31, 2007
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