When you have diarrhea and your stomach gurgles as a sign you're running out of time and have to get to a toilet ASAP.
Similiar to the Death Rattle, however instead of a it being death that awaits, its a life threatening toilet experience
Oh god im getting the shit rumble dear God help me
Similiar to a death rattle, shit rumble is when your stomach gurgles when you have diarrhea, as a threat to find the nearest toilet before you run out of time and your asshole betrays you.
I just got the shit rumble, im afraid for my life