Removing dynamic pages with Robots.txt

[bradseo]

I've got a huge newbie questions and I'm really having trouble finding a difinitive answer.

I have lots of URLs that like this that are indexed:

www .mysite.com/cars/bigredcars?...then lots of dynamic variables

I want to basically block everything all things bigredcars? and after. Is this possible with a robots file if I blocked it like this:

disallow: /bigredcars

or

disallow: /bigredcars?

I'm not sure if I should use a wild card or not. I mainly wanna fix this problem for Google, but I've heard rumblings of the big 4 handling a situations like this differently.

Thanks.