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
by suburban_hiking December 12, 2011
"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."
by Foxymoley January 7, 2021