D'oh is the signature groan of Homer Simpson from The Simpsons, the long-running American animated sitcom, used whenever Homer makes a mistake or realises something has gone wrong. The line became one of television's most recognisable catchphrases and has been dubbed into many languages, including Japanese, where the delivery keeps the same frustrated tone. Clips of the Japanese version circulate as a reaction sound on meme pages and in short videos, where the familiar character and the unexpected language make a simple fail feel funnier and more shareable.