Grumper

Any toilet, outhouse or fecal collecting area.

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

by Phartman February 28, 2013

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? "

by Hokenstad July 30, 2019

grumper

Hilarious synonym for anus.

I stuck it in her grumper.

by grumperthumper April 25, 2008

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.

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

by collinD May 30, 2006

join grumper

a join-grumper is usually a normal looking man who does something inexplicable to other men.

arif khan (at the weekend)

by preston outatime March 22, 2005

Punched Grumper

N, V, Adj. - Anything or anyone involved in shits of an insidious nature.

Noun - "That kid is the epitome of a punched grumper."
Verb - "Oh shit, dude. I gotta punch a grumper."
Adjective - " That bitch burnt me worse then that punched grumper from KFC last night."

by The Grump Puncher December 16, 2008