what is #ootd mean
OOTD means Outfit of the Day. OOTD Meaning: Outfit of the Day. OOTD is one of the most popular hashtags on Instagram with over 32 million tagged photos. OOTD means âOutfit of the Dayâ, a very popular acronym and hashtag on Instagram, and used often on Facebook, Twitter, Tumblr, and other social media websites and apps.