The act of making an exaggerated frown in the shape of an upside down "U." Often used when someone is being ridiculed in a joking situation.
While grumping be sure to make your frown as curvy and unpleasant as possible
by mmoneh November 17, 2011
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A particulary difficult yet ultimately satisfying bowel movement.
That was a hell of a grump I just took.
by meempants September 6, 2002
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“A mythical Creature so elusive that to actually see one would bring untold good fortune” referenced in the movie One Week
I’m going to ride my motorcycle across Canada in search of Grumps
by I_M_CDN November 11, 2010
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1) the disposal of a bad attitude or exceptionally grumpy perspective. 2) The byproduct of general grumpiness
agitated venting girlfriend: "We never do what I want to do! We always go to all the stupid bars YOU want and hang out with YOUR friends and...OMG these pants dont fit me anymore?!! FML"

boyfriend: "wow...sounds like someone needs to take a grump"
by tfortso January 17, 2011
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To add an entry on Grumper.
I posted a grump today at Grumper.org, check it out!
by Asyra June 11, 2009
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To take from, either Violently, Sexually, or Passively
1. Im gonna grump that bitches V-card tonight when shes wasted.
2. Im gonna go grump some fresh chipolte
3. Im going to grump your life on Call of Duty 4.
by fresh grundle November 28, 2008
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A poo that requires a minimum of 10 wipes or 6 wipes + 1 cottonelle.
Oh man, i gotta get to the bathroom and grump before Im sittin in a puddle of mud.
by JGLOW June 19, 2009
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