不义之财--------ill-gotten money

例句：
A: It's said that he got a lot of money by gambling.
据说他借赌博赚了许多钱。
B: Don't be envious. Ill-gotten money comes easily and goes easily too.
别羡慕。不义之财来得容易，去得也容易。

同义词：
filthy lucre
hot money
ill-gotten gains/wealth