D-oh Definition
interjection
Expresses frustration or anger, especially at one’s own stupidity.
"I just paid for our food." "You didn't have to. It's free." "D'oh!"
Wiktionary
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Origin of D-oh
Imitative. Later popularised by the cartoon character Homer Simpson in The Simpsons. Voice actor Dan Castellaneta has said he modelled his version on the drawn-out "do-o-o-o" sound made by Jimmy Finlayson in the films of Laurel and Hardy.
From Wiktionary
