The phrase comes from Overwatch culture, where Genji has long been one of the highest skill ceiling heroes in the roster. Calling someone a pro Genji became shorthand online for spotting play that looks far above the lobby's level. The clip spread as a reusable soundboard and meme reaction, detached from any single match, and is now pasted over highlights in other games too. Its appeal lasts because the compliment is simple, specific to Genji, and instantly understood by shooter players.