frou-frou (n.)youdaoicibaDictYouDict[frou-frou 词源字典]
1870, "a rustling," from French (19c.), possibly imitative of the rustling of a dress. The word was popularized in English by a French play translated and given that name. Meaning "fussy details" is from 1876.[frou-frou etymology, frou-frou origin, 英语词源]