This line comes from League of Legends, the multiplayer online battle arena game released by Riot Games in 2009, where an in-game announcer reports kills, objectives and other key events to both teams. The ally version plays whenever a player on your own team is killed, making it one of the most heard announcements in a normal match. Clips of the line spread through gameplay videos, streams and meme edits, where creators reuse it far beyond the game itself to announce any fictional or real-life defeat with the same deadpan authority.