Imodium Maneuver
(n) A technique where one decides not to cheat on his or her significant other by feigning an oncoming outbreak of diarrhea. The Imodium Maneuver allows one to save face and remain loyal to his or her significant other without insulting the other party or parties.
Pat was in a hot tub full of strippers and totally wanted to cheat, but then he used the Imodium Maneuver. The girls weren't insulted and he excused himself - everything was cool.