Nouveau riche refers to a social class.

Nouveau riche (French: 'new rich' ) is a term, usually derogatory, to describe whose wealth has been acquired within their own generation, rather than by familial inheritance. The equivalent English term is the new rich or new money (in contrast with "old money"). Sociologically, nouveau riche refers to the man or woman who previously had belonged to a lower social class and economic stratum (rank) within that class; and that the new money—which constitutes his or her wealth—allowed upward social mobility and provided the means for conspicuous consumption, the buying of goods and services that signal membership in an upper class. As a pejorative term, nouveau riche effects distinctions of type, the given stratum within a social class; hence, among the rich people of a social class, nouveau riche describes the vulgarity and ostentation of the new-rich man and woman who lack the worldly experience and the system of values of old money, of inherited wealth, such as the patriciate, the nobility and the gentry.