The Ultra Kill callout comes from competitive multiplayer games, where announcers mark multi kill streaks in rising order. After double and triple kills, ultra kill signals four opponents defeated in quick succession, just below a full rampage. The booming voiceover style spread from arena shooters and MOBA matches into streaming culture, where viewers instantly understood the rank of the play. Clips and soundboards later isolated the line on its own, making it a reusable reaction for gaming edits, montages and ironic non gaming moments.