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1.
Explosive diarrhea that has been known to hit the back of the toilet bowl, underneath the toilet seat, splash back up and hit your ass, or even hit the front of the toilet bowl. Mostly found in sketchy gas stations, water parks, and McDonald's restrooms.

Most commonly caused by a night of drinking followed by a morning of eating some ridiculously tasty fried food!
Oh my gosh, that can only be described as thunderrhea, I cannot believe someone did that in a Shell gas station on the way to Florida!

Hurry up and get home, I am about to thunderrhea after eating the Krystal!
by Big E 23 May 06, 2012