When a girl (normally your little sister)bends over and sticks her young plump ass in the air. She scoots her knees close to her elbows and puts her face in the dirt while you and your friends take turns punching her in the anus and vagina simultaeneously. Best if done with an in/out piston like motion.
Double fisted whammy fucker. I tried it for the first time in Iceland.