Green’s Dictionary of Slang

Cross, the n.

1. [1940s+] (Aus.) King’s Cross, Sydney, the ‘bohemian’ area of the town; thus crossite, one who lives there.

2. [2000s] King’s Cross, London, the area around the mainline railway station.

In derivatives

Crossite (n.)

[1960s] (Aus.) an established inhabitant of the Kings Cross area of Sydney.