While skinny dipping you dive under water and make sure that your rear end breaks the surface while letting out a fart. If successful this will mimmick a whale blowing out air.
Getting rid of the whales in a group of girls to increase your chances of scoring with one of the more pleasing girls in the group.
Usually achieved by filling the whale/s with enough booze to cause passing out, or by handing them a McDonalds coupon for a value mealdown the street.
Hot girls always have whale friends at the club so me and the guys went whaling and cleared them out so we could get withthe babes