When a person has had a over dose of Mexican food,(Burritos, Tacos, Nachos, etc.)
Once to much is consumed the colon will start to rot and eat itself out. The colon then excretes a large amount of mookey or Chocolate rain.
Man, I just put some chocolate rain in that Taco Bell bathroom.
The act of one asking his or her sexual partner to with hold from crapping for three days. On the last day the constipated participant consumes a dose or two of any given laxative. The moment before deification, the other partner reams the feces back inside of the participant making for a slick ride.
Having fecaphiliac tendencies, Mark asked his new bride for participation in chocolate rain.