The line comes from Overwatch, Blizzard's team-based hero shooter released in 2016. It is the voice line for McCree's Deadeye ultimate, warning enemies just before he locks on and fires. Players quickly turned the callout into a catchphrase, and it spread through gameplay clips, montages and memes as shorthand for an impending showdown. Although the hero was later renamed Cole Cassidy, many fans still use the original McCree name, and the line remains instantly recognisable to players and viewers alike.