nouveau riche/ˌnu:vəu ˈri:ʃ; nuvo`riʃ/ n(pl nouveaux riches/ ˌnu:vəu ˈri:ʃ; nuvo`riʃ/) (usu pl 通常作复数) (derog贬) person who has recently, and often suddenly, become rich, esp one who displays his wealth ostentatiously 暴发户.
牛津英汉双解词典