Something you answer with if you really don't give a shit for a question you were just asked, or if you don't want to give a legit answer, you just say "On weekends n' stuff" and you can occasionally add in "y'kno.." depending on how you feel about the situation. If they continue to question you, just force in another "y'kno/you know..."
bob: Hey, is it true you hooked up with Jane?
Fred: On weekends n' stuff, y'kno..
Bob: What?
Fred: you know...
A cultural phenomenon, to be a part of which includes becoming sufficiently hounded and clubbing for those cognitive enough. The night ends deep into the AM at the persons house closest to the city, and the morning after involves watching tv and feasting on mcdonaldsbreakfast.
Ryz: How was hooray for boozey weekends IV?
Joe: Pretty good, Eso is a lightweight and couldnt get out of the cab.
Ryz: Haha, Chris threw up on a wall and got into a club. Hooray for boozey weekends!
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.