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To sit on a toilet and defecate in tandem. When one person sits with their back against the water tank and at least one other sits in front of them on the toilet seat and they defecate in a synchronized fashion. If it is two men, the genitals may rest above or below the seat at the individuals discretion.

CAUTION: do not attempt to do with more than 3 people unless you have trained with John Candy.
My friend and I had to shit at the same time and there was only one toilet, so we pulled a Haitian bobsled.
by El Gallo Loco May 05, 2011
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