フットバッグ

noun

footbag; hacky sack

A small beanbag-like ball used in the game of footbag, where players keep it in the air using their feet. Hacky Sack is a common brand name often used generically.

• 公こう園えんで友とも達だちとフットバッグをして遊あそんだ。

  I played footbag with my friends at the park.

• 彼かれはフットバッグの技わざを練れん習しゅうしている。

  He is practicing footbag tricks.