Action of snowboarders, while waiting in line for the snow skiing, of slapping their snowboard on the snow, with one foot strapped in, while standing on the other foot. This is done ostensibly to remove accumulated snow, but actually to just make a loud obnoxious noise to draw attention to, or entertain, themselves (see also narcissistic sociopath). The term comes from the sound made by beavers, dolphins, whales, etc. of slapping their tails on the water.

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