old-fashioned (adj.)youdaoicibaDictYouDict[old-fashioned 词源字典]
1590s, "in an outdated style," from old + past participle of fashion (v.). As a type of cocktail, attested from 1901, American English.
Old Fashioned Tom Gin Cocktail Mix same as Holland Gin Old Fashioned Cocktail using Old Tom gin in place of Holland [George J. Kappeler, "Modern American Drinks," Akron, Ohio, 1900]
[old-fashioned etymology, old-fashioned origin, 英语词源]