Green’s Dictionary of Slang

homie n.2

[homey n.1 (3)]

(Aus.) a person who wears expensive brands of sportswear.

[Aus]G. Seal Lingo 105: homies, an Americanism, refers to those who wear expensive brand-name clothing, such as Nike and Adidas.
[Aus]Sydney Morning Herald (Aus.) 6 Jan. n.p.: So here’s a tentative guide to Sydney teenspeak: [...] Homie (a sporty type).