A person who is struck by a debilitating case of diarrhea, explosive or otherwise, and has the misfortune of other stomach related ailments. While relieving said diarrhea the individual is overtaken by the sudden urge to vomit and is forced to do so into the already poo contaminated water. Upon contact with the water’s surface the projectile vomit splashes the contents up into the individuals face… they have just been shitfaced.