Nyan Cat began in April 2011 as a YouTube video combining a pixel-art cat with a Pop-Tart body, a rainbow trail and an upbeat Japanese pop track. The animation and song quickly spread across forums, remixes and reaction videos, becoming one of the defining memes of the early 2010s. Its simple melody and cheerful absurdity kept it in circulation long after the original peak, and creators still borrow short pieces of it for nostalgic jokes, transitions and soundboard drops.