Hadouken debuted as Ryu's signature projectile move in Capcom's Street Fighter series and became famous worldwide with Street Fighter II in arcades in 1991. The name combines Japanese words for wave and fist, matching the cupped-hand fireball Ryu and Ken throw. Players shouted it along in arcades, and the sampled cry later spread to forums, flash animations and early video memes. Because it instantly signals a classic fighting game attack, creators still reuse the sound for parodies, rematches and any over-the-top throw, long after the original cabinets disappeared.