A "rusty nail" is a type of cocktail made from a combination of Scotch whisky and Drambuie, a sweet, herbal liqueur. The drink is typically served over ice in an old-fashioned glass and can be garnished with a lemon twist. Its flavor profile is rich and complex, balancing the smoky notes of the whisky with the sweetness of the liqueur. The name "rusty nail" is thought to originate from the drink's amber color, reminiscent of a rusty metal nail. This cocktail has been popular since the mid-20th century and is often enjoyed as a digestif after meals.