The line comes from Blizzard's hero shooter Overwatch, released in 2016, where gunslinger Cole Cassidy announces his Deadeye ultimate ability with it's high noon before firing. Cassidy, originally named Jesse McCree, channels classic Western duel tropes, and players quickly adopted the phrase outside the game. Clips, remixes and parodies spread it across forums, streams and video edits, turning a gameplay warning into a widely recognised cue for an impending showdown. It remains popular because even people who never played recognise its cowboy standoff meaning.