d'oh
intjUS /doʊ(ʔ)/ · UK /dəʊ(ʔ)/
Etymology Imitative. Popularised by the cartoon character Homer Simpson in the TV show The Simpsons. Voice actor Dan Castellaneta has said that he modelled his version on the drawn-out "do-o-o-o" sound made by Jimmy Finlayson in the films of Laurel and Hardy. The OED has references from the BBC as far back as 1945.
1
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!