1. a person who has recently acquired wealth, power, or social status and is regarded as not having earned it or as lacking the refinement expected of someone in that position
Usage: often used critically or dismissively; from French

Examples

• The old money families viewed the tech billionaire as an arriviste who lacked proper breeding.
• She was dismissed by the art world establishment as an arriviste despite her genuine talent.
• The arriviste CEO made flashy purchases to display his newfound wealth.
• Critics called him an arriviste for his sudden rise to prominence in the fashion industry.
• The country club's longtime members considered the newly wealthy businessman an arriviste.