save breath

save (one's) breath

To spare the effort of saying something, doing something, or making an appeal that will be futile. Save your breath, Tom. There's no way they'll agree to the deal. I was going to complain to the phone company about the extra charges, but I decided to save my breath.
See also: breath, save
Farlex Dictionary of Idioms.

Save one's breath

Fig. to refrain from talking, explaining, or arguing. There is no sense in trying to convince her. Save your breath. Tell her to save her breath. He won't listen to her.
See also: breath, save
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

save (one's) breath

To refrain from a futile appeal or effort: Save your breath; you can't dissuade them.
See also: breath, save
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • a fast talker
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • a straw will show which way the wind blows
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • all for the best
  • a thing of the past
  • a slew of (something)