When one is having sexual intercourse with their partner and right before climax one strikes her in the back of the head with vigorating force with intent to cause the twatty fun hole to give an ultimate masturbation grip on one's super studley retarded man snake. Side effects generally are major bruies around the dangle worm of fury, loss of memory, concussion, and possible though rare, coma, death, and loss of function of the man-gina or the man-gina itself.
Dick hardcore donkey punched Jane and gave her amnesia.
Police Report: "A couple abbrasions on the back, possible cause of death is a hardcore donkey punch to the back of the cranium. The Twatty Hit Slap Antagonist has strucken again..."