free money “意外之财，白拿的钱，不劳而获的钱”

【例句】
When I figured out a way to get free money, all I could think about was the money.
当我想到如何捞不劳而获的钱时，我脑子里想的全是钱。

Who doesn't like free money?
谁不喜欢天上掉馅饼的好事？