Consensual sex between people who hate each other.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

the act of displacing anger through fucking unbenounced to the other person.

To seriously just loath the person you are having sex with so much that you actually aren't enjoying having sex with them and are instead taking out all of your other frustrations on them. One would usually hate fuck someone who either: is a total bitch, a prude, a whore, or someone who simply looks at them the wrong way and pretty much had it coming.