snob
US /snɑːb/
UK /snɑːb/

1.
a person who believes that their tastes in a particular area are superior to those of other people
:
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He's a wine snob and only drinks expensive vintages.
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Don't be such a fashion snob; wear what you like.
2.
a person who imitates, cultivates, or slavishly admires social superiors and is condescending to others
:
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She's a social snob who only associates with the wealthy.
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He became a terrible snob after he got rich.
1.
behaving in a way that suggests one is superior to others
:
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He gave me a snob look when I mentioned my old car.
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Her tone was very snob when she talked about art.