Donkey Punch
Donkey punch is a slang term for punching someone hard on the back of their head whilst having sex with them
Donkey punch may also refer to:

Donkey puncher, slang term from the 1920s for operator of a small steam-powered winch used in logging
Donkey punch (cocktail), a rum-based drink with orange juice and ginger ale
Donkey Punch (2005 film), an adult film
"Donkey Punch", a 2006 episode from season 2 of Robot Chicken
Donkey Punch (novel), 2007 novel by Ray Banks
Donkey Punch (2008 film), a British horror film