To make a vodka watermelon, make a small hole in the top of your watermelon, and pour in 4 shots of vodka a day using a funnel. Do this for 4 days and son you will have an amazing vodka infused watermelon.
To make watermelon infused vodka, chop up half a glass full of watermelon pieces and mash them up. Strain off the juice. Add half a glass of vodka and leave in a cool dry place for 4 days, then strain the infused vodka to remove the watermelon flesh.