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Phrase(s): Don’t waste my time.
Do not take up my valuable time with a poor presentation.; Do not waste my time trying to get me to do something. • Bob: I’d like to show you our new line of industrial-strength vacuum cleaners. Bill: Beat it! Don’t waste my time. • "Don’t waste my time!" said the manager when Jane made her fourth appeal for a raise.
McGrawhill's American Idioms And Phrasal Verbs