ねずみ講こう

noun

pyramid scheme

A fraudulent investment scheme where participants recruit new members to pay earlier investors, named after the rapid multiplication of mice. Often used in legal and consumer warning contexts.

• ねずみ講こうは法ほう律りつで禁きん止しされている。

  Pyramid schemes are prohibited by law.

• 彼かれは友ゆう人じんにねずみ講こうに誘さそわれたが断ことわった。

  He was invited by a friend to join a pyramid scheme but refused.