save your breath

No one cared, and we might as well save our breath.

And if you're planning to ask me why, save your breath.

I don't hear a word, and you may as well save your breath to answer my question.

A few of the brighter ones were saving their breath in order to cover the ground more quickly.

I told him to save his breath and lie still.

We must go on with all speed, and save our breath.

After shouting a few more times, he decided to save his breath.

Mary realized she might as well have saved her breath.

The candidates, they suggested, should save their breath for the economy and health care.

Kirk didn't try to talk to her, saving his breath for the effort.