parvenu
('pahr·vĕ·noo)
[n.]
a person who has suddenly risen to a higher social or economic status but has not been socially accepted by others in that class; an upstart.
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ExampleExample
Ronnel was nice enough, of course, but because he was “new money” in an “old money” town, he was a parvenu who struggled to be accepted by his wealthy peers.
