Nyan Cat is a YouTube video uploaded in April 2011, which became an internet meme. The video merged a Japanese pop song with an animated cartoon cat with a Pop-Tart for a torso flying through space and leaving a rainbow trail behind. The video ranked at number five on the list of most viewed YouTube videos in 2011.

On April 2, 2011, the GIF animation of the cat was posted by 25-year-old Christopher Torres of Dallas, Texas, who uses the name "prguitarman", on his website LOL-Comics. Torres explained in an interview where the idea for the animation came from: "I was doing a donation drive for the Red Cross and in-between drawings in my Livestream video chat, two different people mentioned I should draw a 'Pop Tart' and a 'cat'." In response, he created a hybrid image of a Pop-Tart and a cat, which was developed a few days later into the animated GIF. Nyan Cat was based on a real cat: Torres' pet cat Marty, who died in November 2012 from feline infectious peritonitis.