Where did "Fling Flang Flu" originate?

I grew up in Poland, Ohio - just south of Youngstown. When I was a kid, we used the ritual "Fling Flang Flu" (or possibly "Fling Flang Floo") to determine who goes first for various games.

The ritual is between two kids: one kid chooses evens or odds, each holds a hand behind their back, they chant: "fling, flang, flu" and on "flu" they each "fling" their hands out with zero to four fingers (no thumbs). The total, even or odd, determines the winner. I seem to recall that it would be the best out of three flings.

I now live in the Akron (Ohio) area, about 50 miles west of where I grew up. The weird thing is that people my age that grew up in the Akron area don't know this ritual.

If you used "Fling Flang Flu" as a kid, can you please leave a comment regarding where and when you learned it?

Thanks!