穷光蛋

The vicissitudes of life may suddenly make a rich man very poor.

人世的沧桑中, 一个有钱人突然也会变穷光。

He used to be a millionnaire. But now he has become a bum.

（例）他曾经是个百万富翁，不已经变个穷光。

By stopping all payments to her sons, she made all three of them poor at one blow.

个儿子她一个子儿也不给，他们一下子全穷光。