Popcat is an Internet meme that originated in October 2020. It features a series of videos showcasing two images of a domestic short-haired cat named Oatmeal. In one image, Oatmeal has its mouth closed, while in the other, its mouth is open. The second image is edited to give Oatmeal's mouth an 'O' shape. The meme quickly gained popularity due to its simplicity and the humorous contrast between the two images. Users often synchronize the opening and closing of Oatmeal's mouth with various sound effects or music, adding to the comedic effect. The widespread appeal of the Popcat meme has made it a staple in online culture, frequently appearing in social media posts and meme compilations.