A game for two people, both hold their hands as if praying but with arms stretched in front and fingertips touching.
Each person takes turns to try and slap the back the others hands before they can withdraw them. If they succeed a slap they get another go. If they miss, their opponent has their turn.
If a player withdraws their hands three times when a slap has not been attempted then their opponent has a free slap...wherever and and however hard they want.
(muhahah)