An Italian bitter liqueur flavoured with 40 botanicals (including liquorice root, nutmeg and sweet and bitter oranges). Amaro Montenegro, "the liqueur...
First met this in a restaurant in Florence (Auditore). At the end of the meal the young chap offered limoncello. I looked at him and said "what would your grandad have served for the digestivo" and he came back with a glass of Montenegro. Its a good in all kinds of drinks one might take at the end of the evening - not beating you over the head with dramatic bitter flavours.