The Grumbles 

The ability to triple one’s density after passing out from a night of drinking aka being a Whendii

“Hey man I can’t move them”
“Are they giving you the grumbles?”
“Yeah?”
“You won’t be able to move them tonight then… just toss a blanket their way”

The Grumbles by ORYQOL November 23, 2021

Case of the grumblies 

When someone is hungry for a specific food item.

Brian had a case of the grumblies so he went to chick-fill-a.

Case of the grumblies by Raviolionmytoes November 3, 2019

The Grumble 

Noun: The last uphill before you reach your destination.

Most commonly used by those completing a run, walk, bike ride, or other physical activity.

So named, because it makes you grumble.

"We're almost home! We just have to make it over the grumble and we're there!"

"Oh fuck, I totally forgot this hill was here. I fucking hate the grumble."

"I was doing really well, and then I hit the grumble and I just had to stop and walk it."

The Grumble by WhenIMetLucy May 24, 2018

grumble on the beat 

before a rapper starts to begin, he or she will sometimes state the fact they they will get the beat ready to rap on. keystone state of mind

yeah,
uh,
its tayyib ali man,
grumble on the beat,
you know what it is

grumble on the beat by asssburgers May 22, 2011