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1.
Someone who is crazed by the idea of sex. Their fascination by the act of sex and desire to begin intercourse, superceeds all other rules and respects otherwise obeyed by the general public.

Often, the sex enacted by such creatures is brutally inappropriate and completely of this world. Sometimes, public displays of this can be observed in the changing rooms of large department stores.
Horny Devil: "Come back to my house baby"
Person: "Why would you want to?"
Horny Devil: "I want to rip your clothes off with my teeth before we hit the sack.. if we last that far"
Person: "Sounds good."
by GentleCaress January 18, 2009
 
2.
A horny devil is a person that is about 150cm tall, has a dirty mind and dreams about naughty things all day. horny devils are quiet rare but when you find one, proceed with caution, because you will never know what will set one off into a apoccaliptic rampage of rapage.
Victim: "hello over there"
Horny Devil: "Heyy why dont u come sit on my lap for a while"
Victim: "okay but pleease dont fondle me"
Horny devil: "i will try not to"
the victim then sits down and gets fondled with
by that guy sitin over there October 23, 2010