when you and your homie each simultaneously throw a nut up in different nostrils of a broad and let it drip down the back of her throat. this can be done as a solo act. it would then just be called a drip. but if youre going to get wet you might as well go swimming, right?
note: the art of the double drip is having both nuts penetrate the nasal cavity simultaneously and with equal force.
"hey bro, lets double drip this bitch - i heard shes a freak like that."