Duolingo's owl, Duo, became an internet meme for its relentless lesson reminders, with fans joking that the cheerful bird would threaten anyone who broke a streak. The Latin or be flattened line fits that running joke perfectly, turning a school subject into a mock ultimatum that creators reuse whenever discipline slips. It spread through short-form edits and soundboards, where the short, punchy delivery makes it easy to drop over study fails, forgotten homework and abandoned apps. Its staying power comes from that shared recognition: almost everyone has felt nudged by a language app.