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Nearly the same thing as Explosive Diarrhea, but with differences.

1. Explosive diarrhea can occur all at once or over a long duration with repetitive blasts. However, shotgun diarrhea is all at once, nearly tearing your asshole(and the space-time continuum) to shreds.

2. Explosive Diarrhea is a condition always occurring on the toilet, whereas shotgun diarrhea can be in public or on the toilet.
Last night I was at a dinner party, and right when I went to get up I had some shotgun diarrhea that sprayed all over the governor of Wisconsin, who was sitting right behind me.
by wierd ass bitch October 05, 2009
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