O dark -thirty 

Very early. Early enough to seriously fuck up the day before, and the day of the event in question.

Yo...we had to get up at O dark -thirty to get to the meeting on time.

O dark -thirty by Rick Burns December 23, 2006

o'Dark 30 

A general term referring to any time between midnight and sunrise the next morning.

I don't want to get up at o'Dark 30 to go to the gym.

o'Dark 30 by 3atMyCak3 February 18, 2011

o'dark hundred

they use it in the military

o'dark hundred are the hours before the sun comes up

oh shit, I gotta wake up at o'dark hundred tomorrow morning

o'dark hundred by joel April 11, 2000

dark o'clock 

When it's so late at night or early in the morning that it's dark out.

"Man, I stayed at work til dark o'clock yesterday" or "I woke up and it was still dark o'clock"

dark o'clock by kimber_kev August 27, 2005

dark o'clock in the morning 

The hours between midnight and dawn, when it's morning but it's totally dark and no one's up unless they absolutely have to be.

Go to bed early, hon. We have to catch the bus at dark o'clock in the morning to get there on time.

dark o'clock in the morning by 2011Grad August 11, 2010

odark 

Odark - very early in the morning, so early it's still dark outside.

I have to wake up at odark 30 to make it to the airport.

odark by creativename844 January 19, 2023