It's when you put toilet paper in a toilet bowl before defecating so that the feces float and achieve full throttle air contact so that the smell may stench the whole area. This phenomenon is commonly practised after bad hotel service.
Dude I left a floatingisland of reprisal at the Hotel! Dude the floating island of reprisal stenched the whole room!
A unnecessary, usually invasive, humiliating and painful medical test ordered by a physician to get even with an unruly or disruptive patient.
"Debbie - did you notice Dr. Leibowitz ordered a full colorectal exam on the guy who came in for eight stiches across his forehead?"
"Yeah, during admission, the patient called Dr. Leibowitz a money-grubbing Jew. It sounds like a reprisal procedure to me. Excuse me. Dr. Leibowitz has asked me to mix parking lot gravel with the K-Y Jelly."
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.