Nickname given to a girl with the name bronwyn.
Often they will give themselves this nickname, and even advertise it. Such as placing badges on their car.
A Bronzilly can be easily identified by their whore like behaviour, cheating on boyfriends etc.
They also tend to be gold diggers.
Dude 1: Dude, that Bronzilly is horrible!!
Dude 2: Damn, you got stuck with that gold digger!