A supercar or exotic car is a very expensive and high-performance sports car or grand tourer.
Supercars are marketed by automakers as unusual and include limited production specials from an "elite" automaker, standard-looking cars modified for power and performance, as well as models that appeal to enthusiasts from smaller manufacturers.
"Supercar" is also a label custom car retrofitters reserve for their showcase, one-of-a-kind project vehicles; typically these are very extensively modified collectible muscle cars, sports cars or grand touring automobiles updated to the very latest "streetable" racing technology.