上流社会/上流阶层
people who have been taught how to behave in a socially correct way
 in polite society/company Sex never used to be discussed in polite society. 过去在上流社会从来不谈有关性的问题。 
 Their church shocked polite society by allowing a man to take more than one wife.
 This event reminds us that racial tension often lurks just below the surface of polite society.
 He does have a nickname, but not one that can be repeated in polite company.
 That husband of hers is not fit for polite company.
 See also: polite