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."