a waste of energy

a waste of energy

A useless, vain, or redundant effort or action. It turns out the boss had already chosen a direction for the project, so my presentation was a complete waste of energy. Don't bother trying to change my mind about this, it's a waste of energy! Mom is never going to let you stay out till midnight—your attempts to sway her are just a waste of energy.
See also: energy, of, waste
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
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