Ethiopian Rock, Paper, Scissors

Surely one of our readers knows the answer to this one.

I ordered a DVD called Ethiopian Kids Playground (which, by the way, helped Neti to break through the nothing-to-do-with-Amharic phase). On the video there's a sort of Rock, Paper, Scissors-type game where a group of kids circle up and put their hands in the center as they chant "someboday" (sum-bud-DAY). Neti immediately jumped in and wanted to show us how to play. However, she has no idea what "someboday" means. Is it an Ethiopian word or just an English "somebody" with an Ethiopian accent?