The mood someone is in when they have lingering diarrhea, which results in an irritation due to over wiping.
by darth duder May 7, 2011

When one male angrily has sex with another male from behind, the giver gets a little grumpy and reaches around and inserts his pinky finger into the urethra of the male he is also penetrating.
Dude I can't sit or pee this morning, Rudy must have been in a bad mood last night as he gave me the Grumpy Dan.
by Grumpy Dan May 25, 2019

by Palmer McCshitter June 4, 2022

by ProLancer2351 June 28, 2021

by BN_Bears March 20, 2025

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
