When one puts both hands upon another's buttocks, grasping each butt cheek - one in each hand - rubbing them vigorously in wild motions; Most often performed by males to females. Males often squat behind the female subject to gain full presentation of the buttocks at face level, grabbing the butt cheeks from underneath, which offers a more firm grip on the female's rump.

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