0-dark-hundred en · NOUN
Meanings
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(US, slang, uncountable) An otherwise unspecified time of night; some time when it is dark out.
It's late, and we have to get up at 0-dark-hundred to got to Paris in the AM.
2011, Diane L. Sheridan, Don't Forget the Flippin' E: A Memoir, page 290:Which is precisely why I'd volunteered as point man on this little jaunt, prowling and growling up the unlit stairwell of a Cairo slum at 0-dark-hundred to catch my quarry napping on his bedroll.
1996, Richard Marcinko, John Weisman, Green Team: Rogue Warrior III, page 4:
Relateds
beer o'clock · dark thirty · 0-dark-thirty · oh dark thirty · oh dark hundred · zero dark thirty