拳けんを打うつ

expression, godan verb (-tsu)

play a hand game (e.g. rock-paper-scissors)

Refers to playing a game where participants simultaneously show hand gestures, such as rock-paper-scissors (じゃんけん) or similar hand games. The expression is somewhat literal: 'strike a fist'.

• 子こ供どもたちは拳けんを打うって遊あそんでいる。

  The children are playing a hand game.

• じゃんけんをするとき、みんなで拳けんを打うつ。

  When we do rock-paper-scissors, we all play the hand game together.