Know how to use "fewer" and "less"? Find out.
1590s, "in an outdated style," from old + past participle of fashion (v.).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]