This sound comes from Team Fortress 2, Valve's multiplayer shooter first released in 2007. The domination cue became familiar to players because domination is one of the game's most memorable rivalry mechanics, rewarding repeated eliminations against the same opponent. Outside the game, the clip spread through YouTube montages, gameplay compilations, and short meme edits whenever a creator wanted a quick audio shorthand for total victory. It still gets used because TF2 remains iconic, and the cue instantly communicates competitive bragging rights to many players.