Grumoy 

When a guy and girl have vaginal/anal sex so hard that both are groaning in an animalistic way, the girl biting onto the blankets and begging for mercy

Andrew analled Alex so hard she was biting and moaning on everything she could possibly ravage, in other words, she was grumoying

Grumoy by andrewcansuckmydick December 26, 2012

Dropped a Grumpy 

Dropped a turd; passed your bowels

The party was raucous. So many stoned people! Somebody even "Dropped a Grumpy" on the bed!

Dropped a Grumpy by talk2me-JCH2 April 20, 2022

rip a grumpy 

to take a shit

a soon as i finished my coffee iran to the bathroom to rip a grumpy

rip a grumpy by havalaf October 5, 2009

Grumpy bomb 

Dropping explosive negativity on an otherwise neutral or positive conversation.

We were sitting around the table having a nice conversation about all the great movies out right now when Leila came in the kitchen and dropped a grumpy bomb on us.

Grumpy bomb by AYYFRON January 17, 2011

dropping a grumpy 

A polite way of saying that you’re shitting a massive turd. One of which causes you to make an angry face.

After eating that second helping on taco Tuesday, Jeff was in the bathroom for a good hour dropping a grumpy.

dropping a grumpy by anonymous July 1, 2021

Dump a grumpy. 

To defecate.

Every morning I dump a grumpy.

Dump a grumpy. by Archibald H. Wigglesworth December 17, 2008

take a grumpy 

The act of having a bowel movement.

You better pull over, I need to take a grumpy.

take a grumpy by mangus May 24, 2004