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waste (one's) breath
To talk of, discuss, or say things that are likely to be ignored or are in vain. Don't bother trying to change my mind about this, you're wasting your breath! It looks like I wasted my breath trying to pitch my idea to the board of directors.
waste no time (in) (doing something)
To act or do something immediately or as expediently as possible. Wow, Sarah wasted no time finding a new boyfriend after she and Rob split up. We have to have the application in by tomorrow morning, so we must waste no time in getting everyone's signature that we need.
waste on (someone or something)
To expend something on a person or thing that will not appreciate or properly utilize it. A noun or pronoun can be used between "waste" and "on." Her talent in art is wasted on me—I have no eye for design.
1. mod. dead; killed. That’s silly. We all end up wasted one way or another.
2. mod. alcohol or drug intoxicated. I’ve never seen a bartender get wasted before.
3. mod. exhausted. I worked two shifts, and I’m totally wasted.