It should be counted. There are plenty of cars that for whatever reason are neither cool nor uncool. Doesn't mean the voter is undecided. If you have no opinion on a car then there's no need to vote on it.
Many cars are just "Meh", and it's impossible to describe them better.
I say keep it. I usually use it for cars that are so lacking of any kind of personality that they just can't be cool or uncool. Like a Camry for instance.
What do you mean by "with modifications"?
i was going to vote for "meh"...