Hornsby is the maddest city in the fucking world. Hornsby is located just north of Sydney in New South Wales, Australia. There tends to be a lot of teen violence, drugs and alcohole in the area.
Joel: Dude you wanna come with me and some chicks to Castle Towers tomorrow?
Tim: Nah man. I'm goin' to Hornsby. You and the girls can come along.
A girl who is of highschool age, but appears to be much younger. Has the appearance of a 6th or 7th grader.
Rodney: yo, look at his girl.
Patrick: Yeah, she looks so young.
Rodney: Yeah, She's such a Hornsby. I wonder if he has to go pick her up after school everyday?