Invented one long, cold, snowy weekend when I lived in Ashfield - a small hilltown located 20 miles west North west of Amberst, at the base of the Berkshires. Needed:

2 or more of your favorite people
1 banana
1 tray ice cubes
1 1/2 or more c. chocolate ice cream
4 (2 oz.) portions of your 4 favorite alcoholic beverages
A generous splash of Triple Sec
Milk to taste

Also acceptable is coffee, vanilla and strawberry but nothing with nuts.

I recommend kahlua, Galeano, vodka, brandy.

Mix in blender to your preferred consistency. Do Not Drive!