集しゅう団だんヒステリー

noun

mass hysteria

Refers to a phenomenon where a group of people exhibit similar physical or emotional symptoms with no identifiable physical cause, often triggered by psychological or social factors.

• 学がっ校こうで集しゅう団だんヒステリーが発はっ生せいし、多おおくの生せい徒とが同どう時じに気き分ぶんが悪わるくなった。

  Mass hysteria broke out at the school, and many students felt sick at the same time.