Grumpy Muffler

The act of defecating into one's Air Duct or AC System, causing a foul shit-like smell within the entire facility.

My Boss fired me and I got back at his Bitch Ass by giving the office a "Grumpy Muffler", that'll teach them!!

by Ass-lickin-lova December 12, 2023

grumpis

Awesome grandpa and you should love him forever

Grumpis. Here you go here is 150$

by Boiboi1212 August 1, 2019

grumpy

the act of pooping in someone’s bed

“amber just took a grumpy in my bed!”

by coppernickelfish May 2, 2022

Rip a grumpy

To fart (ferociously)

Tom: (farts loudly!)
Jim: did you just rip a grumpy?

Tom: I’ve had bad farts all day.

Jim: oh, I agree grumpy buns.

by Michael Muffins February 25, 2025

Grumpy Customer

A really big dump, that may or may not be currently slamming against your rectum.

Hey guys, I'd love to help you, but I've got one hell of a grumpy customer right now. It requires my full attention.

by walrusnuts November 18, 2020

Grumpy Milkshake

Grumpy Milkshake
A hand job while the giver of the hand job is in a bad mood

My girlfriend was in such a bad mood last night but at least she still made a Grumpy Milkshake

by BN_Bears March 20, 2025

Grumpy gooch

A rash formed on your gooch from over working a worn out, sweaty gooch.

Damn Bailey I have a grumpy gooch today.

by I’m really him July 27, 2021