Someone wrote that "Doo-dah_" was Camptown ladies' code for "Hey, Sport, wanna have some fun?" or a varient thereof. No dea is it's true. Also, Do Not become infected with the dread Doo Dah virus, which causes people to say (or sing),"Doo Dah" whever anyone in the room says something that fits the meter (Member, New York Stock Exchange; Downtown Buses run all night, Mudcat people write too much; DOO DAH). This annoys everyone, at least everyone I'm around.