Someone that likes being naked. Naturist may be used more specifically to refer to those that get naked to feel closer to nature, however in most cases is interchangeable with nudist.
Because of the controversy of nudity in America, many naturist resorts there locate in obscure locations.
A pretentious nudist.
John: I'm going to the nude beach.
Amy: Oh, you're a nudist?
John: No, I'm a naturist, peasant.