a person who admires people in the higher social classes too much and has no respect for people in the lower social classes 势利小人；谄上欺下的人 a person who thinks they are much better than other people because they are intelligent or like things that many people do not like 自以为优越的人；自命高雅的人
Word Originlate 18th cent. (originally dialect in the sense ‘cobbler’): of unknown origin; early senses conveyed a notion of “lower status or rank”, later denoting a person trying to imitate those of higher social standing or wealth. Folk etymology connects the word with Latin sine nobilitate ‘without nobility’ but the first recorded sense has no connection with this.