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Phrase(s): Let me have it! [and] Let’s have it!
Inf. Tell me the news. • Bill: I’m afraid there’s some bad news. Bob: Okay. Let me have it! Bill: The plans we made did away with your job. Bob: What? • John: I didn’t want to be the one to tell you this. Bob: What is it? Let’s have it!
McGrawhill's American Idioms And Phrasal Verbs