Full Eject
When a person's bladder and rectum are in such massive distress from holding their contents that the instant they sit on the toilet, all hell breaks loose from both orifices.
Jimmy: "I can't believe you ate 10 bean burritos and drank a 2-Liter of Mountain Dew!"
Robert: "Yeah, I was Mount St. Helens, man. By the time I got to the toilet...Full Eject!"
Robert: "Yeah, I was Mount St. Helens, man. By the time I got to the toilet...Full Eject!"