Grumpstink 

When a person throws themselves into a tantrum of such ferocious proportions that they inadvertently pass wind.

"Dude, Ashton went off the rails so bad last night that she pulled a grumpstink! My flat still hums of it."

Grumpstink by Prof. S May 4, 2010

Grumpstep 

A musical sub-genre that consists of (normally) electronic remixes of audio clips from a famed Youtube channel, Game Grumps. Such songs include "Goof Troop Boof", "Banana Shoes", "BaBoom", and "Ice Hair".

Dude 1: Aw, man! Did you hear that Grumpstep song by xXJerryTerryXx?

Dude 2: Which one? Banana Shoes?

Dude 1: Yeah! I had that song stuck in my head for a whole week!

Grumpstep by Random_Grumpling November 11, 2012

grumptard 

A grumpy and retarded person

Channa says Peter is a grumptard all the time

grumptard by PitaBread January 20, 2008

gumpot 

The remains of chewed gum thrown by people onto the floor (indoor or out) to which over a period of time, said remains of gum resembles a black pot hole, but without the hole. There currently exists specialized tools to remove gumpots, usually consisting of a long pole and a gillette type blade on the end to scrape them off the floor. However, gumpots are ubiquitous AND perpetual, around the world due to humans fixation and habits relating to chewing gum.

The train platform was littered with gumpots due to commuters discarding their chewing gum on the floor.

gumpot by L. Zibetti October 1, 2007

Grumpitude 

One's overall level of grumpiness. Grumpitude, also known as the grumpitude factor or grumpitude quotient is a numerical value, rated on a logarithmic scale similar to that of the richter scale for earthquake magnitude. A grumpitude factor of 6 is 10 times higher than a grumpitude factor of 5.

Whoa man, chill out. You don't need to be exhibiting such levels of grumpitude.

Grumpitude by Z Bomb November 15, 2007

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

Grumpatron 

A grumpy person, or a state of grumpiness that comes over a normal person; causing the afflicted person to make snappy rude remarks and become very unsocial.

Ryan won't go to the movies because he's a grumpatron, and nobody likes his company anyways.

Grumpatron by Xumill January 21, 2010