Joondi rat means in slang: Joondi rats look very much like city rats, but they live in a completely different environment. Joondi rats, also known as Joondalup in Perth are troubled teenagers who live at Joondalup. The rats spend their time outside Joondalup’s shopping center. They spend their youth shopping, doing drugs and getting in fights. Joondi rats are most active at 5pm. If you’re looking for late-night shopping, avoid the train. The basic uniform they wear is the same as city rats: adidas track pants and kappa jumper. (in Slang Dictionary, added by Kaylin Stanley)