The phrase comes from the long-running your mum joke format, a form of teasing humour built on a short, unexpected comeback rather than a detailed insult. Online, that format thrives because it is instantly recognisable, easy to remix and safe for short-form video, where a single line can carry the whole joke. Clips like this one are shared as reaction sounds for comments, duets and edits, and they keep circulating because the humour does not depend on a specific show, game or celebrity. Its appeal is the shared familiarity of the joke itself.