G o'clock
When you're so wasted you think it's 2 in the morning but it's actually 2 in the afternoon and you're still wearing pajamas
"I'm not going to work. It's 2 o'clock. I'm still in my socks."
He showed up at the party at 5 o'clock wearing his bathrobe and a sandwich.
I tried to go to sleep at 10 o'clock, but I was still wide awake at 3 o'clock.