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A Green Russian is a cocktail of absinthe and milk. The mix ratio isn't specific, but many follow the same ratio as Black Russian (because of only having 2 components) even though it resembles a White Russian closer with the dairy part; with five parts absinthe (alcohol, vodka in the Black Russian) to two parts milk (softener, coffee liqueur)
Video Green Russian
Origin
Created in the TV show Archer by one of the characters, it is listed as 2 ounces Absinthe, 2 ounces Vodka, 1 ounce Creme de Menthe and 2 ounces milk (or heavy cream)
Maps Green Russian
References
Source of article : Wikipedia