The 'D'oh!' grunt is the signature catchphrase of Homer Simpson, voiced by Dan Castellaneta on The Simpsons, the long-running animated series that premiered in 1989. Homer blurts it out whenever his schemes collapse, and the writers leaned on it so often that it became shorthand for comic frustration. It crossed into the real world early: the Oxford English Dictionary added 'doh' in 2001. Online it thrives as a reaction clip, Turkish meme pages among them, where a half-second of Homer's regret says what a paragraph cannot.