The Arabic word zmara refers to a whistle, and clips like this one circulate widely on soundboards and short-video platforms rather than coming from one famous film, show or recording. Creators pick it up because it is instantly recognisable, easy to drop into a joke and short enough to fit a punchline without slowing the edit. Over time it has become a handy reaction sound for memes and pranks, kept in use by its simplicity and by how well its bright tone stands out in busy audio.