The Last Word is a cocktail - from the Prohibition era, it seems. It combines oddball, rare ingredients in simple 1:1:1:1 proportions:
The Last Word
3/4 oz. Gin
3/4 oz. Maraschino
3/4 oz. Green Chartreuse
3/4 oz. fresh lime juice
Shake over ice and strain into cocktail (martini) glass.
It just happens that I have all of these ingredients handy, so I mixed one up. Here is my report: It tastes like Chartreuse. Not quite straight Chartreuse, but pretty close.
I would reduce the Chartreuse to about 1/4 oz.; maybe reduce the Maraschino the same way or keep it at 3/4 oz., since it is fairly subtle. I'd bump the gin up to a full shot, because why not. I also thought it would taste good with an egg white for the fizz and mouthfeel.
Then I realized that I was recreating the 'Treuse or Dare from One Flew South in Atlanta, with a little Maraschino. So I basically gave up on this cocktail. If you want to drink Green Chartreuse on the rocks, go ahead. If you want a great gin-and-Chartreuse cocktail, try the 'Treuse or Dare.