mega-rrhea Posted in M Best definition mega-rrhea diarrhea that is so powerful, explosive, and often times painful that it breaks all normal standards of fecal expulsion. “I drank 30-pack of beast ice last night and boy do I have mega-rrhea” How satisfied are you with the definition? Looking for mega-rrhea meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 74 times.