Nyan Cat began in April 2011 when a YouTube video combined a pixel-art Pop-Tart Cat GIF with a fast, cheerful Japanese pop song built around the word nyan, the Japanese sound for a cat's meow. The three-and-a-half-minute loop exploded across YouTube, forums and early social media, spawning remixes, merchandise and countless parodies. Its simple melody and absurd flying-cat image made it instantly shareable, and it remains a shorthand for cheerful internet silliness and deliberate, good-natured annoyance more than a decade later.