Sexy, particularly as relates to sex with anthropomorphised animals, cartoon animals, or sentient animals, any of which may be known as a furry. From yiff.
That vixen is yiffy.
by Benfold February 20, 2003
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(in furry fandom)
adj. 1. Horny, aroused; 2. Sexy or attractive sexually
1. "Oh God I'm yiffy."
2. "Did you see her? She was yiffy."
by Colin Ritter August 06, 2003
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Wanting to have sex in an animal costume with others in animal costumes.
I'm feeling Yiffy today, grab your costumes!
by Zombiefied December 18, 2013
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Turkish overweight Male who loves "My little pony" and hates Christianity, most commonly wear "Fedora" hats. Most commonly friend zoned by their girl friends.
Friend 1: hey man look at that guy yelling at himself
Friend 2: you don't want to get in between that
Friend 1: because that's a Yiffi, if you make him mad he will find facts about science and scream them at you

Friend 2: ok man, thank you I didn't know that.
by AviTekBabaYon December 18, 2013
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