What is a muscle car

I wouldn't consider my barracuda to be a muscle car. It really doesn't take that much effort to drive it. I'd call mine a less refined sports coupe. It's not a sport car even though 99% of the time I drive around with the back seat down so it looks like a 2 seater. (I do that with my caprice wagon too. :D The way back seat is completely folded down and the back seat back is flipped forward)

My car isn't a sports car, or a pony car in the sense that I think of it. It's a sports car (in the works, not quite there yet) that happens to have 5 seats.