Grumper 

A decorative bumper commonly found on Jeep Wranglers that combines a bumper and grill. A must have bolt on part for any JK mallcrawler with 20"+ wheels that wants to distinguish themselves from the standard "Angry Eye" jeep.

"Kyle just dropped $1500 on that new Fabfours Grumper, friggen shame he he didn't spend it on lockers, eh? "

Grumper by Hokenstad July 30, 2019

grumper 

Hilarious synonym for anus.

I stuck it in her grumper.

grumper by grumperthumper April 25, 2008

Grumper 

In a nut shell, a gay person who supports Trump. They usually drive a bright colored jeep with a lift kit and at least one of a gay couple has a muscular build and a beard.

Those Grumpers think that just because they voted for Trump, they won't get marched to the Gay Correction Camps. Sorry but the evangelicals are coming for ya! Trump himself is a closeted gay (Roy Cohn) but that don't mean shit~!

Grumper by Ed Abull January 5, 2025

Grumper Bumper 

When you are in a bad mood but your significant other wants to engage in sexual intercourse. This is called the grumper bumper because although you're not in the mood, who are you to turn down sex, so you push through with the grumper bumper?

My hoe ass bitch burned my toast, and thought she deserved this dick! She pissed me off so I gave her the grumper bumper.

Grumper Bumper by keithyweithy June 23, 2022

Grumper Butt 

Another word for Alicia Harr. Because she always acts like a trumpet butt.

Quit being a grumper butt.

Grumper Butt by UnluckySloth February 5, 2025

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

pump a grumper 

to take a huge hard dump

damn im never gonna hti a mexican buffet liek that again, i had to pump a grumper really bad ten minutes later

pump a grumper by collinD May 30, 2006