Meaning of "Outfit of the day"

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Outfit of the dayootd#SNS#줄임말#라이프스타일2010s Meme

An abbreviation for "outfit of the day" (OOTD), a term used to record and share what one wore on a given day (especially on social media)

"I wore the dress I bought this morning, and it was totally OOTD vibes, so I posted it on Instagram right away."