The sound comes from Homer Simpson, the central father character in The Simpsons, the long running animated sitcom created by Matt Groening that began in 1989. The line itself is not English but Czech, to je dobry, an everyday phrase for approval that non Czech speakers also understand from context and tone. Short Homer reactions have circulated for years on soundboards and in meme edits because the voice is so familiar, and this one second version spread as a compact reaction for moments that deserve simple praise.