A situation in which without taking Immodium, you will almost certainly shit yourself. Examples include situations of fear, embarrassment or extreme laughter in which you lose control over your bowels.
Man, I wish I popped an immodium because I diarrhea'd all over myself and the audience while walking the tightrope. That was true immodium challenge.
(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.