young blood
new blood

Act your age people, or get some young blood in.

This young blood tried to share the wealth one night by sticking them up.

And they had taken her for some young blood in cavalry!

It was well the church had this strong, young blood.

In two years I'll be seventy; younger blood must take over.

After that I don't care what the young bloods do.

Wonder what it will be like to have young blood under this roof again?

I could see the young blood coming up and that things were changing.

We're all agreed that the partners could use some fresh young blood.

In time, the lack of young blood may mean something else.