poseur (n.)youdaoicibaDictYouDict[poseur 词源字典]
"one who practices affected attitudes," 1866, from French poseur, from verb poser "affect an attitude or pose," from Old French poser "to put, place, set" (see pose (v.1)). The word is English poser in French garb, and thus could itself be considered an affectation.[poseur etymology, poseur origin, 英语词源]