The phrase 'OK Boomer' became a viral internet sensation in 2019 as a retort used by younger generations to dismiss or mock the perceived outdated, condescending, or narrow-minded attitudes of the Baby Boomer generation. It gained mainstream prominence through TikTok and Twitter, eventually evolving into a cultural shorthand for the frustration Gen Z and Millennials feel regarding climate change, economic inequality, and social progress. While it sparked significant debate over ageism, the meme remains a powerful tool for subverting unwanted advice or patronizing lectures with a simple, two-word shutdown that signals the end of a productive conversation.