Rumbl means Roll Under My Bed Laughing kinda like rofl only 200 times cooler..it's going to be famous.

A huge brawl involving many people.

Two different types:

Stomach Rumblies: when you can feel a rumbling sensation in your stomach and know that you're either going to throw up or drop deuce

Ass Rumblies: when you feel a rumbling sensation in your ass and you need to find a bathroom asap

When your tummy gurgles and hurts. Usually, after a Taco Bell binge.

to be found out

1. (noun) A no-holds-barred fight between at least two rival street gangs or any other organization.

2. (verb) To fight as such

when you eat college food and you feel some bowel movement in your stomach and you need to find a bathroom immediately.