Donkey punch
practice of inflicting blunt force trauma to the back of the head or lower back of the receiving partner during sex
en-US/ˈdɔŋki ˈpʌnt͡ʃ/
en-GB/dɒŋkiː ˈpʌnt͡ʃ/
practice of inflicting blunt force trauma to the back of the head or lower back of the receiving partner during sex