When non-PT people ask, I usually laugh and tell them it stands for 'Particularly Terrific'!
Seriously though, when I got mine, I asked the dealer: he said it stands for Personal Transportation. The part I love is the vehicle definition: I called Chrysler after my city classified it as a sedan, the state says its a light truck, and my insurance agent chose sub-compact. Chrysler's answer? NOT classified on purpose: all things to all people, I guess!
