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."