The act of having sex like an angry Koala. When the male becomes very aggressive and strikes the female into submission during intercourse. Slapping of the ass, and pushing down if the face is a must to complete this style of sex. It is also encouraged to not let the female position herself in any sort of way or fashion.
Donovan and Ashley had crazy Koala sex! She tried to move and he planted her face down! Then he smacked her ass until she let him do whatever he wanted!