Operation: Evacuation
A synonym for explosive diarrhea. Usually occurs after the consumption of shady ass food, drinking more than your ass (literally) can handle, and other fun stuff.
Charlie: "That white castle last night fucked me up. I gotta go use the shitter."
Ross: "Yeah that food demanded for Operation: Evacuation."
Charlie: "Word."
Ross: "Yeah that food demanded for Operation: Evacuation."
Charlie: "Word."