The act of insterting a man's penis into a woman's vagina during her menstrual period. When his penis is covered in blood, the man insterts his penis into the woman's anus. When he removes his penis, it looks as if the woman was shot and is bleeding.
(n) An a-moral and utterly loyal henchman or lackey.
Taken from the urban legend concerning former President John F. Kennedy who reportedly enlisted the aid of a White House assistant to hold the head of the of the woman he was screwing (doggie-style) in a bucket of cold water, 'causing her to clench up, making the experience more enjoyable for the President.