Fill a coffee cup with 2/3 of coffee and then fill the cup all the way with vodka.
(Originally they used moonshine, but that is illegal nowadays, so..)
You can also mix it the old fashioned way: Put a coin in the bottom of the cup, fill with coffee until you can't see the coin, then fill up with vodka until you clearly can see the coin again.
Drink Occasion: Summer Break
Glass Type: Any
Drink Stength: Strong
Drink Difficulty: Beginners