Meaning of 井の中の蛙大海を知らず in Japanese
Definition of 井の中の蛙大海を知らず
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(exp) parochial; provincial; used to encourage someone to get a wider perspective
世間知らずにもほどがある。井の中の蛙大海を知らず、ということかね。
I can't believe you're so clueless. You're like a babe in the woods.