The line comes from Counter-Strike: Global Offensive, Valve's tactical shooter where Terrorists plant an explosive and Counter-Terrorists try to stop or defuse it. It is the counterpart to bomb has been planted, and sits alongside other iconic announcer calls like Enemy Spotted in players' memory. Because rounds often end in seconds, the defused call became shorthand online for a job finished just in time. Gamers reuse it in edits, streams and memes far beyond CSGO matches to mark any successful save.