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Medical term for a pool cue sized fecal ball that causes an inordinate amount of methane to build up behind it. When the pressure becomes too great, the fecal ball is shot out the anus at a high rate of speed. Falls under the category of "Explosive Bowel Movements".
"My god, Pedro hasn't crapped in weeks, then, outta no where, "BANG"!!! He craps so hard, he busted the toilet tank with an Impacted Fecal Hamshot".
by Johnny Rotten Pants January 27, 2010