When in an aquatic environment, such as a hot tub or pool, you and your bros take turns vigorously waving your hand in the direction of a bro's genital region to stimulate sexual gratification. This is best done when there is no female present. To clear up any discrepancies about ones sexual orientation, the act of wave whacking is non-homosexual, because there is no physical contact with the other bros body.

see also: dutch rudder

When you eat dirt for the first time and leave your family to build a shack in the woods