(adj) Someone or something which has reached an absolute, final, or perfect stage, usually as a cool, fashionable, good or desirable thing. (Mid-20th century hipster argot; the idea is that the person or thing is so good it has left the party, town, or planet.)
1)"he's gone and there's nothing you can do about it!"-John Gotti
2)"gone off thatwater water"-Master P
3)"i'm up out, i'm gone, ghost, later"-Dj Quick