SundaySleep
Sleeping excessively into Sunday afternoon due to the fact that you stayed up all of Saturday night playing WoW, partying, hanging out, or just masturbating cuz nobody called...

Usually prolonged until roughly 3:00 p.pm.

Usually followed by a rush of last-minute Sunday night home-work, and eating cereal for dinner.... or dinner for "breakfast"
1. "DUUUDE! That party was so awesome! It's already 4 a.m.! We have a huge project to do today!"

"Dude fuck that. I'm SundaySleeping."