a waste of breath

a waste of breath

Talk or discussion that is without worth, done in vain, or likely to be ignored. Don't bother trying to change my mind about this, it's a waste of breath! It looks like my whole pitch to the board of directors ended up being a waste of breath.
See also: breath, of, waste
References in periodicals archive ?
Nor law, nor duty bade me fight, Nor public men, nor cheering crowds, A lonely impulse of delight Drove to this tumult in the clouds; I balanced all, brought all to mind, The years to come seemed waste of breath, A waste of breath the years behind See photos of the Great War at mirror.co.uk