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.