The phrase comes from Die Hard, released in 1988, where Bruce Willis plays New York police officer John McClane, who uses the cowboy-style greeting as a defiant one-liner against the terrorists taking over Nakatomi Plaza. It returned in later Die Hard films and became one of the most quoted action-movie lines of all time. Online, the short shout spread through meme edits, reaction videos, gaming clips, and soundboards, where its instant recognition makes it a shorthand for a comeback, a victory, or a hero refusing to back down.