don't tell me

idiom

Definition of don't tell me 

1 used to request that someone not give one information because one wants to guess what it is "I know the answer." "Don't tell me. I want to guess."

2 informal used to show that one already knows what someone is going to say especially because he or she often says such things "I have a favor to ask of you." "Don't tell me—I bet you need to borrow more money, don't you?"

3 informal used to express surprise and disappointment "Don't tell me the concert tickets were all sold out?!" "No, I bought the last two tickets."

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exaggeratedly or childishly emotional

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