Grumpy Pumpkin 

Someone who is in a fowl mood

Adam lost his poker game so he was a Grumpy Pumpkin

Grumpy Pumpkin by Miss Jenna December 3, 2005

grumpy pumpkin 

the person who is the giver of a grumpkin

I'm going to make that bird a grumpy pumpkin by the end of the night

grumpy pumpkin by steesher December 26, 2011

grumpy pumpkin 

After performing ATM on someone, during which you've pulled out a plum, their teeth become fouled with said plum they become angry and sad and in a horrific grimace have a shocking resemblance to a jack-o-lantern.

My third grumpy pumpkin was with Angela. That bitch was already missing a tooth so it didn't take much to go full pumpkin.

grumpy pumpkin by t-pyle March 25, 2009

pumping a grumpy 

1. fucking the shit out of an old dude until he has a heart attack

2. tryin to insert your dick into a frisky squirrel.

"I caught that whore fucking my grandpa!"
"Yeah man, she was pumping a grumpy"

"Last night i was pumping a grumpy, and the mother fucker bit me"

pumping a grumpy by Big Jerms August 23, 2005

Pumping a grumpy 

Slang for having a bowel movement, pooping, taking a shit, etc

Bro where the hell were you, we lost the game because of you

Stfu, I was pumping a grumpy.

Pumping a grumpy by Davehar March 28, 2025

Grumpypumping 

when you and your spouse have intercourse after an intense argument.

Me: My girlfriend broke my lamp so I have her a good grumpypumping.

Grumpypumping by hawaiislang May 12, 2016

Pumpin' a grump

Act of taking a dump. Used when said act was particularly satisfying.

Ben: Damn, your house stinks!
Ryan: Yeah, I just finished pumpin' a grump.

Pumpin' a grump by bneffer January 6, 2009