The sound comes from Code Geass: Lelouch of the Rebellion, the 2006 anime series following exiled prince Lelouch Lamperouge. Granted the power of Geass, he can issue an order that others must obey, and the Japanese phrase built from meirei and shine signals a command to die. Clips of his most ruthless orders circulated through anime forums, video edits and soundboards, where the short line became shorthand for an unstoppable command. Its continued use reflects how closely the moment is tied to Lelouch's calculating image.