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."