One Pound Fish comes from Muhammad Shahid Nazir, a fish seller whose street call at Queen's Market in London was filmed and spread online in 2011. The catchy chant became a viral song, then a bigger internet meme through remixes, reposts and short-form comedy edits. It is still used because the hook is instantly recognizable, easy to loop and funny in contexts involving prices, food, dancing or deliberately cheesy viral nostalgia.