To tell you the truth, my NBP has been dubbed "Tonka Truck", "Box on Wheels", and the all too overheard "Ugly". I'm sure plenty of others have been approached with the question "What the hell is that?"
The strangest ones I've heard are "It looks kinda like a limo from the front" and "I hate to tell you this, but it kinda looks like a hearse". Not sure where and what time these people are from, but okay...to each their own.
Though I've heard almost everything in the book, the officially dubbed name of the car is..."The Box" (as in Lucky you, you get to ride in "The Box".)