Definition
Some unspecified hour in the early morning (implies an unpleasant time to be awake)
Origins
From military time, in which hours before 10:00 am are prefixed with a zero, read as "oh", and 00 minutes is read as "hundred", as in oh five-hundred for 5:00 am.
In Context
- "I had to get up at oh dark hundred to catch a plane."
Also Said As
- crack of dawn
- stupid o'clock
- wee small hours
- early morning
See Also
- 0-dark-thirty
- dark thirty
- oh dark thirty
- zero dark thirty