Ponzi scheme
noun [ C ] uk/ˈpɒn.zi ˌskiːm/ us/ˈpɑːn.zi ˌskiːm/
（欺骗投资者，把新加入的投资者的资金用来支付利息给原来的投资者，而不是用于投资的）庞氏骗局
a way of deceiving investors (= people who give money to a company hoping to get more back) by using the money they give to pay interest to existing customers rather than investing it