Lord Jaraxxus is a demon lord from World of Warcraft who first appeared as a raid boss in Trial of the Crusader and later became a playable warlock hero in Hearthstone. His theatrical, booming delivery made his lines easy to lift into memes, and short shouts like this one spread through soundboards, gaming edits and reaction videos. Because the word is so direct, it needs no context to work, which is why it has stayed popular for calling out mistakes long after players first heard the character.