Thumb war
01
親指戦争, 親指バトル
a hand game where two players interlock their thumbs and try to pin down their opponent's thumb for a count of three, similar to traditional wrestling but using only the thumbs
例
They were laughing so hard during the thumb war that they could barely keep their hands still.
彼らは親指戦争の最中に大笑いしていて、手をほとんど動かせなかった。
