Both the Last Word's name and the simplicity of its traditionally equal parts recipe lend themselves to adaptation. It is also very much a bartenders'...
The Last Word appears on a Detroit Athletic Club menu dating from 1915, where it is the highest priced cocktail on the menu at 35¢. A Manhattan, for example, can be had for a mere 15¢. You will find several online images of the menu if you do an internet search.