Top Definition
The result of either; the ingestion of a laxative spiked beverage, or cheap whiskey that results in abnormally swampy and stinky discharge that feels as if it was being removed from the anus by a sump pump.
Dude why did you buy that nasty ass whiskey, I had such a bad sumpy dump!
by justinjoshkelly October 15, 2007
5 Words related to sumpy dump

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