The Definition of "MuscleCar"

Simple: Factory intermediate car with a big motor. NOT a Camaro or Mustang or Duster because they are "pony" cars and far too small. It needs to be something like a GTO, Road Runner, Chevelle, ect. Medium car, BIG engine. Personally, I think it is fun to stuff big power in a small car and what I end up calling it is F.A.S.T.