Meaning

noun a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class

adjective characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position

adjective of or characteristic of a parvenu

originBorrowed from French parvenu, past participle of parvenir, from Latin perveniō (“arrive, reach”). See also parvenue f

Etymology from Wiktionary, CC BY-SA 3.0