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3. I wasn't born yesterday!

I wasn't born yesterday!

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I/he/she wasn't born yesterday!

something that you say in order to tell someone that a person is not stupid and cannot be easily deceived You'd better think of a better excuse about the dent in my car. I wasn't born yesterday, you know! You can't expect your mother to believe that - she wasn't born yesterday!

See There's one born every minute

See also: born