Zero dark thirty

A humorous way to declare an unknown time in the wee hours of the morning. Especially used by military personnel to describe an unwanted time to be awake or awaken. Usually pronounced "oh" dark thirty.

"What time is morning formation?"

"Have no clue, oh dark thirty I imagine!"

Sgt. Hanson always has us up at zero dark thirty for our morning runs!

by echoseven75 November 30, 2013

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The Dirty Six-Thirty

An area code belonging to the western Chicago suburbs refered to by residents as "the dirty six-thirty". Towns included in the 630 include: Addison, Aurora, Bartlett, Batavia, Bensenville, Bloomingdale, Bolingbrook, Carol Stream, Clarendon Hills, Darien, Downers Grove, Elmhurst, Geneva, Glen Ellyn, Glendale Heights, Hanover Park, Hinsdale, Itasca, Lemont, Lisle, Lombard, Naperville, Oak Brook, Oswego, Roselle, St. Charles, Streamwood, Villa Park, Warrenville, West Chicago, Westmont, Wheaton, Willowbrook, Winfield, Wood Dale, Woodridge, Yorkville.

It's a virtual Sodom and Gomorrah.

You gonna hook up tonight? Fo' shizzle she's from The Dirty Six-Thirty... A-town (Aurora).

by Indy's brother October 17, 2010

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o light thirty

The middle of the day. Between noon and 5pm. After lunch, but before the end of the work day. (The opposite of o dark thirty.)

John: Is the meeting this morning?
Bill: No. O light thirty, I think.

by ChuckChaser69 September 18, 2008

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thirty seconds to mars

thirty seconds to mars is a rock band. Already has many alboms including "A Beautiful Lie" and many others.
other nicks:
30 seconds to mars / 30 sec 2 mars / mars

I'm going to a rock concert of thirty seconds to mars

by maayan friedman November 17, 2007

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o-dark-thirty

Military time designating an unspecified time after midnight but before sunrise. Normally used in reference to either the time one goes to sleep, wakes up, or has to be on-the-job. Usually quite a while before sunrise, i.e.: well before 0500 hours ( 5AM for you civilians )

The name is a play on the way 24-hour time is handled in the Military. Times are pronounced as numbers and written without colons, i.e.: 4:30PM is 1630H or "sixteen-thirty hours". Times between midnight and noon such as 4:00AM are written as 0400 and have the leading zero called out as "zero" or the letter "O", as in "o-four-hundred".

Example: We had to get up at o-dark-thirty to get the job done this morning.

by Princess Die December 01, 2005

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