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.
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

A grumpy as per Johnny Depp vs Amberd Heard - "a human being had dropped a grumpy onto the bed" to shit the bed and leave it for someone else to find.
by Grumpyhunter July 7, 2023

by Moper69 December 17, 2016

dude why is mike in jail "he found out he cant reproduce and did the grumpy marmoset on a group of people downtown."
by grumpy marmoset lover June 9, 2022

Grumpis. Here you go here is 150$
by Boiboi1212 August 1, 2019

by Carlguy42 February 20, 2017
