The idiom "be my guest" is a polite and accommodating expression used to grant permission or give someone approval to do something. It is often used when one person is inviting or allowing another person to take a particular action. While the exact historical origin of this idiom is not precisely documented, it is a widely recognized and commonly used phrase to convey willingness to allow or support someone's request.

英語での「be my guest」の定義と意味

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