mississipi mudslide
(noun) Usually used as a tactic of revenge/humiliation. Upon planning to have anal sex with a man, a woman consumes a healthy dose of laxatives. Then, once the action begins, she proceeds to shit all over his genitals and legs, leaving him absolutely appalled. As he stands in horror, she turns around and swiftly kicks him in the balls.
Still angry over being racooned, she invited him over for the evening, only to completely humiliate him with a Mississipi Mudslide.