Wikipedia
Muk-jji-ppa
Muk-jji-ppa is a variant of the two-player game rock-paper-scissors. It originated in South Korea.
Each person starts with a regular rock-paper-scissors game. The current winner has to say their next hand and change their hand to the corresponding one. This is usually done by shouting. The point is to get your opponent to make the same hand as you and then you win. However, if you both switch, the new winner then calls out their next hand and the process starts over.
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colspan=3| 묵 (Muk)=Rock, 찌 (Jji)=Scissors, 빠 (Ppa)=Paper