Easy to produce (no skilled bar staff or expensive equipment required) lurid green drink for those occasions you want other people to wonder what the fuck you are drinking, rather than actually to drink for its intrinsic worth, which is somewhat akin to toothpaste. Take empty highball glass (or half-pint sleever) and add: English pub measures are probably adequate. Ice might be nice. Cherries, cocktail umbrellas and the like will probably detract from the effect.

If you want something nicer, try the Everything bartender.