Top definition
"Too late" or "very late"
I'll go shopping with you Dena, but I don't want to be out until 50 o'clock!

Yeah, Brad and I finally hooked up on Saturday night -- but he didn't call me until 50 o'clock!
by Anniesokay February 03, 2010
Get the mug
Get a 50 o'clock mug for your girlfriend Sarah.