The reversal of one's horny state via an action or event.
He was totally dehornified when his mom walked in on him and his girlfriend making out.
Adjective: The act of being a total turn-off
The large, sweaty, fat man bent down to pick up a penny in a very Dehornifying way.
Dehornify: when you're talking to someone and can't stop having a strong urge to fuck them right now, so you start talking about stupid shit to dehornify yourself.
"Omg... I want you right now... So how bout them Steelers?... I'm attempting to dehornify cause you're killing me"