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noun: when you shit on the ground. grump = ground + dump
When doodie calls and there isn't a bathroom around, take a grump.

Backpacking ventures almost always entail grumps.
by thebelgianbomber February 08, 2014
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3
a certain state of mind characterized by grumpiness and a generally disagreeable demeanor
Reia spilled her beer all over her self, and was grumps for the rest of the night.
by manfriend July 03, 2004
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4
“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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5
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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6
A nickname that is commonly used for Grandparents and Great Grandparents. The name generally is used for attractive great grandparents, who are with younger women or men.
1. Me and Grump went to brunch this morning.

2. Grump is sexy.
by Char777 February 01, 2019
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