What's your car's nickname?

No need to name my car - all my car are named from the factory - Corolla has C-o-r-o-l-l-a on the trunk and the Matrix has M-a-t-r-i-x on the rear lid.

^unless you have 2 corolla and 3 civic at home.

Then you can expand with color as well - Silver Corolla, Blue Matrix, etc. Unless they are all the same color - then you have to do something about that.