grump out 

A softer way for women to say "get bitchy" but still get this point across; works particularly well as a warning to a significant other.

Ugh," she said. "OK, but if we're still there at midnight, don't be surprised when I grump out.

grump out by Wendy von Bendy August 27, 2010

grump dump 

A "grump dump" is when a person or place is really down in the dumps. When one is not feeling good and is just grumpy all around.

Person 1: ugh, I hate math class!
Person 2: ay stop being a grump dump at least we don't have a test!

grump dump by GRUMP.DUMP February 18, 2017

grump jaw

When a girl is going down on a guy and her jaw gets sore and tired.

“My girl was going down on me and got that grump jaw”

grump jaw by Thatgurltay69 November 20, 2017

Grump Job 

A blow job performed with Game Grumps playing in the background instead of Netflix.

I gave my boyfriend the hottest Grump job during the Wind Waker let’s play last night

Grump Job by Pink Rival December 12, 2018

grump a saurus 

A live-in partner or spouse, usually a wife, who is never happy in the morning. You will know her by the shrieks from frightened small children as they attempt to avoid her unquenchable fiery wrath by throwing the covers over their heads.

Dad: Oh no! Here comes a grump a saurus!
Kids: (Squeals of terror)

grump a saurus by Granitej3 December 1, 2019

grump-chomp 

Elliot

'elliot is such a grump-chomp.'

grump-chomp by plums server January 28, 2022

grump tree 

Green tree that hang over at the top.

Look at that tree that hands over, it looks like a grump tree.

grump tree by Dkemp42 February 28, 2022