parvenu
From Longman Dictionary of Contemporary Englishparvenupar‧ve‧nu /ˈpɑːvənjuː $ ˈpɑːrvənuː/ noun [countable] formal old-fashionedCLASS IN SOCIETY an insulting word for someone from a low social position who has suddenly become rich and powerfulExamples from the Corpusparvenu• It was a newcomer, almost a parvenu, the creation of refugees and pirates.Origin parvenu (1800-1900) French past participle of parvenir “to arrive”