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1.
(Noun) A phenomenon that happens when, while seated and taking a dump, the toilet water splashes onto your asshole, expediting the cleaning and wiping process as if you were using a French bidet.

AKA, Mexican Bidet
Dump-taker: Dude, I dropped a rock-solid deuce yesterday and got such splashback, my ass has never been cleaner before wiping.

Dump-taker's friend: Ah, yes - the classic Dutch Bidet. Why bother renovating the bathroom when you can get one of those?
by Benito Sucio August 29, 2010