In Harry Potter, Avada Kedavra is the killing curse, one of the three Unforgivable Curses, and Severus Snape is the Hogwarts professor whose use of it marks one of the series most shocking turning points. Fans clipped the line for soundboards and short-form edits because the two Latin-sounding words are instantly recognisable even to casual viewers. It remains popular as shorthand for an abrupt, irreversible ending, especially in gaming montages, reaction videos, and Harry Potter fan edits that need a dark punchline without explaining the story behind it.