dibidibidip

a korean children's game. Written 디비디비딥, and pronounced Deebee deebee deep. You point at the person and say dibidibidip, and on dip, you point either left or right. The other person attempts to turn their head in the opposite direction. If they turn their head the same direction you point, they lose.
It's way harder than it sounds.
regional variations exist, including pointing up and down as well as left to right, and a complex group version somewhat like concentration originating from Busan.