Avada Kedavra is a fictional incantation from J. K. Rowling’s Harry Potter novels and their film adaptations. Within that world, it is one of the three Unforgivable Curses and is associated especially with Lord Voldemort and the Death Eaters. Spoken versions became widely recognizable through the films, then spread through fan edits, parody videos, gaming clips, and short-form memes. The phrase remains useful online because audiences quickly understand its connection to lethal magic, even when creators apply it to harmless or absurd situations.