The hour of ridiculous, so late at night or early in the morning that it can't be expressed by a concrete hour.
Though it generally refers to the time between 3:00 AM and 7:00 AM, it can be used in place of any time the speaker finds absurd.
"I can't go home with her, I have work in the morning and she stays out till like, ridic-O'clock.
The time at which an attention seeking whore regularly texts a meme, joke or uninteresting anecdote to a group message to garner a response and/or attention.
Jane Doe just sent a text. It must be Attention O'Clock.
When you gotta take a Mondo dooke.
Yo Lil Carlo its dooke O'Clock.
Legit means what it says. its time for a blem.
"Yo Elroy, what time is it?"
"It's blem o'clock"
when you're too drunk to know what time it is, so it becomes o'clock 30 at all times
"Hey Aaron, what time is it?"
looking at wrist: "o'clock 30"
That terrible time of night when you are lying there in the dark, staring up at the ceiling, asking whatever deity to which you subscribe why in the world you are still awake and cannot (pleasedeargod) get to sleep because you have to be up in 2 hours. Not caffeine or stress related. When spoken, heavy tone of desperation on the "why". Often associated with fear of knowing the sun will be up soon and looking like you were hit by a train that day.
I couldn't drag myself out of bed this morning because I was lying awake at "why o'clock", replaying the last scene from Halo 3 over and over in my head, worrying about my taxes, and humming the Family Guy theme song. I wanted to cry.