Torpedo juice is American slang for an alcoholic beverage, first mixed in World War II, made from pineapple juice and the 180-proof grain alcohol fuel used in United States Navy torpedo motors. Various poisonous additives were mixed into the fuel alcohol by Navy authorities to render the alcohol undrinkable, and various methods were employed by the U.S. sailors to separate the alcohol from the poison. Aside from the expected alcohol intoxication and subsequent hangover, the effects of drinking torpedo juice sometimes included mild or severe reactions to the poison.