OTP, an abbreviation for 'One True Pairing,' is a fundamental term in internet fandom culture used to describe a fan's favorite romantic relationship between two characters. The term emerged in the early 2000s within fanfiction communities like LiveJournal and FanFiction.net to denote the ultimate 'ship' that a fan supports above all others. OTP memes often involve shipping charts, 'draw your OTP' prompts, or simple side-by-side comparisons of characters. Over time, the concept evolved into a versatile meme format where users project their personal preferences onto various media, often sparking playful debates between rival 'shippers' across platforms like Tumblr, X (Twitter), and TikTok.