SNOB

[noun] [C] [esp. disapproving] - a person who respects and likes to be with only those people who are of a high social class, or a person who has extremely high standards in a particular (usually stated) thing and is not satisfied by the things that ordinary people likeHe's a frightful snob - if you haven't been to the right school he probably won't even speak to you.I suppose you wouldn't buy clothes from an ordinary high street shop, would you, Polly - you're such a snob!I'm afraid I'm a bit of a wine snob/a snob where wine is concerned.You pay an extra $50 just for the designer label - for some reason it has some snob appeal/value.