synonyms: parvenu, arriviste, upspring, upstart, West Egger ???
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Definition:
(derogatory) New money; wealthy persons whose fortunes are newly acquired, and who are therefore perceived to lack the refinement of those who were raised wealthy.
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In these days of nouveaux riches it is refreshing to find a case where the scion of an old county family which has fallen upon evil days is able to make his own fortune and to bring it back with him to restore the fallen grandeur of his line.
Arthur Conan Doyle. Sherlock Holmes: The Hound of the Baskervilles (1902)