grumpover 

Kind of like a hangover but not for the same reasons. Very impulse driven, when impulse turns into regret and then adds to a tired body.

Anais has a grumpover.

grumpover by Heyoka May 14, 2004

Grumper 

An especially hot and steamy shit. Grumpers often leave you very sweaty and exhausted. They're mostly taken under less than ideal situations like port-o-johns and bar bathrooms.

Man I was tailgating on Saturday and I had to shit some fierce. I went to the port-o-John and dropped a fiery grumper. My asshole was never the same.

Grumper by Alexdlegit March 25, 2017

Grumperson Jones 

An extremely grumpy, cranky, or unhappy individual.

Watch out, Greg is a Grumperson Jones today!

Grumperson Jones by Emily Jones-Parker July 28, 2010

Grumpler 

A man over the age of 40 who has a natural and constant "grumpy" facial expression which can be emphasized by dark rimmed safety or reading glasses. Grumplers may also possess other unnatural bodily characteristics such as a slightly hunched back and/or a reverse pigeon-toe stance.

"Stop being such a Grumpler!"

Grumpler by Keebler89 January 14, 2010

Niagara Grumper 

An explosive shit. Comes pouring out of your ass with seemingly no end to the flow. Like a hot waterfall of shit.

I ate some bad oysters last night and today I experienced the worst Niagara Grumper. I couldn’t get off the shitter.

Niagara Grumper by Eaton Holgoode January 25, 2018

Grumper 

A very humorous word for poop.

Damn it, I just stepped in the biggest pile of grumper!

Grumper by benwad934 March 30, 2004

grumpster 

n. similar to dumpster, but instead where happiness goes to die
n. a person that sucks the life out of the room no matter how hard you try to cheer them up
n. dark pit of despair, a black hole of unhappiness, a vacuum that sucks all hope and joy from the vicinity

MD is a grumpster because he will suck all your happiness away.

grumpster by JitteryJoe July 27, 2008