如果说某人 in deep water 那就是说此人陷入困境或处于水深火热之中。

例句

We're going to be in deep water if the bank can't authorize our loan.

I'll be in deep water unless I pass all three exams.

She left her brother's laptop on the train! She's really going to be in deep water with him.

请注意

另一个短语 to open the floodgates 意思是打开水闸，打开大门，也可以表示倾诉。

The court's decision could open the floodgates for large numbers of other cases involving human rights issues.