The phrase comes from Dota's multi-kill announcer system, where the game calls out streaks like double kills during matches. That style of dramatic voice line became familiar to MOBA players and later spread into general gaming edits, short clips, and meme compilations online. It still gets used because the meaning is instantly clear even outside Dota: two fast takedowns, two clean wins, or any back-to-back moment worth celebrating with a competitive announcer feel.