The line comes from Tombstone, the 1993 Western centered on Wyatt Earp, Doc Holliday, and the conflict surrounding the O.K. Corral. Val Kilmer portrays Holliday and delivers the remark during a confrontation, matching the character’s calm, dangerous wit. The quote remained recognizable through movie compilations, fan edits, reaction posts, and Western-themed memes. Creators still use it because the setup is immediately understandable: one speaker, two opponents, and complete confidence about the outcome.