最終更新日：2024/07/28

(informal, chiefly in the negative) To be new, naive, innocent, inexperienced, or easily deceived.

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be born yesterday

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be born yesterday

verb

(informal, chiefly in the negative) To be new, naive, innocent, inexperienced, or easily deceived.

I may be young, but I wasn't born yesterday.

意味（1）

(informal, chiefly in the negative) To be new, naive, innocent, inexperienced, or easily deceived.

I was not born yesterday, you know. I have done this before!