Acid Rash Share definition Flag The miserable burning and stinging of the entire rectal area after the release of explosive diarrhea. Dude I can barely walk. I got the hangover shits and a bad acid rash. Acid Rash by Eaton Holgoode January 7, 2016 0 0 Get merch Get the Acid Rash mug. Buy Now — $32.95 See more merch