Top Definition
The act of causing someone great pain by violently defecating onto them to experience extreme pleasure.

Could also be the act of defecating into the water supply of an entire city in order to receive pleasure from the thought of thousands of people drinking your "rrhea".
*Janitor walks into a dirty bathroom*
"My God... looks like some sado-defecism has been going on here."

"Hey toss me another can of that sado-defecism!"
by Loch February 18, 2005

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