1.Hot water

The meaning:troubles and difficulties.

e.g.You are going to ger into hot water with Sam about that.

2.A fish out of water

The meaning:person who doesn't feel comfortable.

e.g.Thus,he looks like a fish out of water in this new company.

3.Talk under water

The meaning:about somebody who talks a lot.

e.g.She is so talkative that can talk under water!

4.In deep water

The meaning:to be in a difficult situation;trouble.

e.g.Bill got in deep water in algebra class.

5.Not hold water

The meaning:about some- thing that is not true.

e.g.Jack's story won't hold water.It sounds too unlikely.