oh dark thirty
oh dark thirty · oh dark thirties
Some unspecified hour in the early morningSome unspecified hour in the early morning (implying an unpleasant time to be awake).
Meaning
1 senses(idiomatic)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.
Origin
From U.S. military terminology, in which hours before 10:00 am are prefixed with a zero, rFrom U.S. military terminology, in which hours before 10:00 am are prefixed with a zero, read as "oh", as in 0530, oh five-thirty, for 5:30 am.
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: oh dark thirtiesSynonyms
4 synonymsWord family
1 related wordsRelatedbeer o'clock
See also
neighbours in the dictionaryDictionary text adapted from Wiktionary (Wiktionary contributors, CC BY-SA 4.0) and Open English WordNet / Princeton WordNet (CC BY 4.0, WordNet License); shared under CC BY-SA 4.0. Example sentences and recordings are credited where they appear.