An anglicised spelling of do. A syllable used in solfège to represent the first and eighth tonic of a major scale.
"The choir director hummed 'do' at the bottom of the scale, then shifted to 're', before finally landing on that high 'doh' an octave above."
Alternative form of d'oh (“expression of frustration”)
"When I finally realized I'd locked my keys inside the car, a loud doh escaped my lips."