What does "don't tell me" mean? I assume that it doesn't literally mean "you don't have to tell me".
"Don't tell me" is an expression used when someone wants to guess what someone is about to say, likely because the answer is unsurprising or obvious. It's used when you want to stop someone from providing more information, because you can already guess what will come next. This is the case of the video here! Ex: Oh wait, don't tell me. You feel sick and can't go to school today? Ex: Why have you come to see me? Don't tell me, you need a favor?
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