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Phrase(s): Give it a rest!
Inf. Stop talking so much. Give your mouth a rest. (Familiar or rude. Compare this with Give me a rest!) • Mary: So, I really think we need to discuss things more and go over all our differences in detail. Bill: Stop! I’ve heard enough. Give it a rest! Mary: Oh, am I disturbing you? • Tom: Now, I would also like to say something else. Alice: Give it a rest, Tom. We’re tired of listening to you.
McGrawhill's American Idioms And Phrasal Verbs