Goaruu comes from the way goal is shouted in Japanese football commentary and anime edits, with the English word stretched to match the pronunciation fans hear in Blue Lock. Blue Lock, the football manga and anime about strikers competing to become Japan's best, helped push this exaggerated celebration style online. Short clips of the shout spread through TikTok edits, gaming montages and soundboards, where its spelling became Goaruu. It stays popular because it instantly signals a scored goal without needing any context.