Done, okay, finished. In a physical state where further intoxication is unneeded. Often used as a polite refusal for more
marijuana,
alcohol, etc. Also used as a general term for reluctancy or unwillingness.
"Yo Lee,
hit greens on this
bowl."
"Aw, no thanks
man, I'm champ from that last one."
"Bro, let's throw eggs at some traffic!"
"I'm champ on that, dude. Count me out."