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

Grumper 

A very humorous word for poop.

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

Grumper by benwad934 March 30, 2004

grumper 

A defecation that requires mass force to expel.

Oh man, I can tell this one is going to be a real grumper.

grumper by John Clever November 27, 2002

Grumper 

A new social networking site that is growing in popularity. Where the Internet goes to complain. www.grumper.org

I posted a grump about swine flu on Grumper. You should check it out and grump it.

Grumper by Asyra June 10, 2009

Grumper 

Addictive website where you can complain about things that annoy you.

I like to use Grumper.org all the time!

Grumper by SexualVegan6Love9 June 28, 2009

grumper 

1. A grumpy person 2. Totally lame.

1. Did you hear Denise whining about her hair? She's a total grumper.

2. No more pudding cups? Grumper!

grumper by jatty July 20, 2009

Grumper 

Any toilet, outhouse or fecal collecting area.

Drew just laid a lincoln log in Cab's grumper.

Grumper by Phartman February 28, 2013