Blue hell:

蓝色监狱 ×

极困难的局面 √

例句：

It was more than tough, it was blue hell.

岂止倒霉，简直是倒霉透顶。

Blue movie:

蓝色电影 ×

色情电影，性爱片 √

例句：

He took in a blue movie when he was in the city.

他在城里拍了一部色情电影。

Bottom dollar:

底层的美元×

最后一块钱√

例句：

I lost my bottom dollar on that deal.

我在那笔交易上把钱蚀得精光。