1.) First, bore holes in your watermelon. You can do this with the use of a corkscrew.
2.) Take out some of the watermelon meat right under the hole you just bored.
3.) Pour about half a cup of Vodka into the watermelon using a funnel and then stick it int he fridge.
4.) Let it set for a couple of hours and then add more alcohol until it can not take anymore.
5.) Slice it up and serve