A self made alcoholic beverage containing 50% whiskey and 50% coke* or energy drink*. This alcoholic culinarity is very popular amongst European (Dutch to be specific) teenagers. The main purpose is to get drunk very rapidly and, as a consequence, have a good time with friends.
The drink has its origin in the nightlife in Lloret de Mar, Spain and since then has spread all across Europe.
Every brand of whiskey is suitable as long as it contains 40% alcohol.
*Adding coke/energy drink isn't necessary but it makes it easier to consume large amounts of booze.
If you add just a little more whiskey it's a dennisje
Go easy on the coke, you need the room in your glass for your whiskey to create a dennisje
Dude, I took 6 dennisjes last night, I was soo drunk!
That guy ain't wearing his shirt anymore, must have had a couple dennisjes!