a sexual encounter in which
one party exhibits such insane, irrational, or bizarre
behavior that the other party is left
afraid of further contact
From the movie Sibyl, in which
Sally Fields, portraying a victim of multiple personality disorder, has sex with some guy and ends up climbing
his bookshelves while claiming to be a succession of different people
and speaking in sometimes demonic-sounding voices.
I took her home, and she sibyl fucked me so hard, I ended
up getting a restraining
order. I still have not replaced
the painting she slashed or the couch she shat on.