Definition of save one's breath in English:

save one's breath

phrase

  • [often in imperative] Not bother to say something because it is pointless.

    • ‘You're better saving your breath for the wedding speech because right now I'm not listening to any of your words!’
    • ‘These worthy protesters could have saved their breath.’
    • ‘After months of writing to my elected officials I feel a whole lot better supporting this project and saving my breath.’
    • ‘I may as well have saved my breath, as everyone is acting like it's next month.’