To be sexually aroused by the fear of being sexually aroused by throwing oneself out of a window into water.
Rhys: Why did you masturbate while you jumped out of a window into the pool?: John: Sorry, I have hydroautodefenestratiaphiliaphobiaphilia, I just couldn't help myself. It runs in the family.
by lend_a_crackah_a_pencil May 07, 2014