Grumbox 

A noun referring to someone who is angry because of the BP Oil Spill.

My grandpa is a grumbox.

Grumbox by Amelia J. December 14, 2010

grumbot 

Grumbot was a robot made to serve mumbo and grian, his two dads, in the great hermatian mayoral race. Grumbot failed but now resides in a small box next to the shoping District.

Grumbot did well in that race.

grumbot by Randomzan14 August 5, 2020

Grumbo 

A deformed creature who lives with a Jewish family in the 1940s. His family ends up getting captured by Gestapo, and is left all by himself in an attic.

Have you seen Grumbo lately? I heard that he's still hiding in the attic.

Grumbo by Zephyr321 April 14, 2019

Grumbo 

The sensation of two midgets simultaneously biting the inside of your ass.

"Oh my god, Britney, I just fucked Jake last night. It Felt Like Grumbo."

Grumbo by Shoes Hee January 23, 2009

grumboy 

When your boy is trying to be daddy but is just too cute atm

Dylan is such a grumboy he almost didn't turn me on

grumboy by thesquipdude January 19, 2018

Grumbo 

something that's really fucking gross or abnormal.

Dude, look at this picture; look how grumbo those tits are lol

Grumbo by watdafak April 22, 2016

grumbo 

to take a poop,the act of deficating

after all the coffee i drank i had to take a mad grumbo

grumbo by ameecia July 25, 2008