bitch o'clock
going to bed anytime before midnight (12AM) is to be considered bitch o'clock. It implies that the person is a bitch since they are self-imposing an early bedtime.
Henry (10:46 PM): Dude, I'm going to bed, I'm really sleepy
Tyson: (10:47PM): nice, bitch o'clock! you are such a grandpa
Tyson: (10:47PM): nice, bitch o'clock! you are such a grandpa
Bitch o'clock
Any time one is forced to be awake thats considered too early or too late.
"I had to get up for work at bitch o'clock!"
"It's on really late, I won't get to sleep til bitch o'clock."
"It's on really late, I won't get to sleep til bitch o'clock."