Mickey Mouse, created by Walt Disney and first seen in Steamboat Willie in 1928, became known for his falsetto voice and optimistic catchphrases, with Oh Boy among the most quoted. The line was used across Disney cartoons, television shows like Mickey Mouse Clubhouse, and theme park appearances, helping cement it in popular culture. Short clips of the phrase later spread on soundboards and social video as a wholesome reaction, valued because it signals excitement instantly without needing context or dialogue around it.