The structure is a blend of "shelf" and "selfie," forming a noun that plays on the popularity of self-portraits while shifting the focus to a bookshelf instead of a face. It is used to describe a photograph of one's bookshelf or book collection, usually shared on social media to showcase reading habits, aesthetics, or literary taste. People typically post shelfies on platforms like Instagram, TikTok, and Tumblr as part of "BookTok" or "Bookstagram" communities, often arranging books by color, genre, or featuring favorite titles.

英語での「shelfie」の定義と意味

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