The act of placing ones bare ass on a subject's face while said subject is sleeping.
"Mark fell asleep with his shoes on, so Jason grumped him.
When Mark woke up, he was visibly upset."
by SneezeFart July 21, 2013
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This is where two people get them selves a dead body. On acquiring the body they leave it to ripen for two too three days, depending upon the weather.
When the body is deemed to be ready, the grumpers take there positions.
One person (the grumpy) places there head between the body's legs. Whilst the other person (the grumper) Jumps upon the body's stomach.
The result is a spray of blood and guts going all over the place and splattering all over the fucking place.
types of the Grumping:
the Frump
Bumping
Bungee grumping
double grumping
The long grump
The high grump
Obese grumping
Skrumping (this is actually the grumping of a skinny person)
Chewbaccaing
Bongoing
piano grump (dropping a piano on a corpse = shit)
by Grumpette December 2, 2009
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A motherfuckin' grumpy-ass dog. He's always grumping and being rude. He doesn't have anything to grump about (except maybe that our McDonald's doesn't have $1 McDoubles) but he continuously grumps. Also a cheapskate and is not forthcoming with kisses or snugs.
Zack: Hey let's go smoke synthetic marijuana!!!

Em: I can't. I have to take this Grump Grump to the vet to get this cone off his head. He's grumping about it.
by Emboslice August 20, 2011
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When you skip a tutorial in a video game, and get stuck or lost in something the tutorial taught. A reference to Arin (Egoraptor) of the youtube channel Game Grumps, who would always skip tutorials.
"Bro, you're grumping it! You shouldn't have skipped the tutorial."
"Ah, yeah, I grumped it."
by queephlosion December 16, 2020
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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 9, 2014
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When a person grind/dry humps a person alive or dead
"Did you see tom and tracy grumping at jimmys party last night?" " dude I totally practiced grumping on my pillow last night."
by Og_grumper_69 August 1, 2017
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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 3, 2004
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