What did you call the drink you created by mixing all the kinds of pop at the fountain drink station together?
There weren't many restaurants in my town with a self-service drink station, if I remember right. Subway was about it. But when we mixed them together, we usually the drink "Suicide." This would have been central Iowa in the 90s. I heard the same in suburban Atlanta a few years later.
I generally hear "suicide" here in Chicago (an informal survey taken at Burger King showed 100% of participants going with "suicide.") However, a friend who grew up in southern Illinois said it went by "suicide" occasionally there, but was more commonly known as "swamp water." I've also heard tell of it being called "graveyard" now and then.
My wife called it a "tornado" in Cleveland in the 80s and 90s.
My grandmother told me that when they mixed all the sodas together in Iowa in the 1940s, they called it "hoopee water." I always imagine the word being spelled as "whoopy" or "whoopee," but those are pronouncd differently. I'm sure there ought to be a W there, but it's not pronounced so much as implied. Not silent, implied. Anyway --- hoopee water.
Early soda fountain publications referred to a similar thing where soda jerks would mix all the leftover bits of soda into a drink they called a "Don't Care." Calling random syrup mixes "don't care syrup" seems to have been universal among soda jerks in the first decade or so of the 20th century, though by the 1930s, when soda jerk lingo was being studied by linguists, "Suicide" and "Graveyard" were both in use in various parts of the country.
What did YOU call it? Be sure to say where and when.