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the enormous gut of an obese person that produces thunderous sounds when it smacks against itself.
yo man do you see that obese person?
ya man she has a dirty thunder gut.
by A-bar June 05, 2010
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The rumbling you feel in your stomach and guts, that indicates the onset of explosive diarrhea.

* Not to be mistaken with a gassy bowel movement, but rather a twisting knife in the guts, pure liquid doodoo, shit your pant, diarrhea.
Hey man, wanna go to the movies? I can't bra, I got them thunderguts!
by MDfart August 30, 2018
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