“Nouveau riche (French for “new rich”), or new money, refers to a person who has acquired considerable wealth within his or her generation.^[1] This term is generally to emphasize that the individual was previously part of a lower socioeconomic rank, and that such wealth has provided the means for the acquisition of goods or luxuries that were previously unobtainable. The term can also be used in a derogatory fashion, for the purposes of social class distinction, to describe persons with newfound wealth as lacking the experience or finesse to use wealth in the same manner as old money—persons from families who have been wealthy for multiple generations.”

- Wikipedia