Phrase that indicates one is not willing to do something. There can be different ways to use this. Commonly used in Orange County, California.
1. Jason: You're not down to go to Flamebroiler!
Aaron: I'm so down!
2 Jason:Let's go to Brea!
Aaron: Nah bro. Not today. Maybe next week.
Jason: what!?Not Down.
a term used in some parts of Southern California. for the most part, "all" typically replaces "you're" or is just needlessly added on.
Phil: Sorry dude, I'm sick today
Johhny:All sick! that sucks man!