oh dark thirty
Some unspecified hour in the early morning (implying an unpleasant time to be awake).
I had to get up at oh dark thirty to catch a plane.
thirty
UK /ˈθɜːti/ US /ˈθɜːti/
noun 2num 1
Definitions
num
1
The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.
To conclude, here in tabular form is a summary of our ratings of espressos produced from thirty pod, capsule and disc blends.
noun
1
A rack of thirty beers.
2
A commercial lasting 30 seconds.
[…] instead of thirties [thirty-second commercials], they buy sixties, which cost twice as much. They spend more on filming it than they need to; they buy a lot of ads that are garbage and don't really say anything, just to fill up the space.
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