Diarrhetic Convulsion Share definition Flag A convulsion caused by rapid ejection of diarrhetic material. Dude, when he saw his sister screwing the horse he practically had a Diarrhetic Convulsion! Diarrhetic Convulsion by Errr June 19, 2006 0 0 Get merch Get the Diarrhetic Convulsion mug. Buy Now — $32.95 See more merch