Yiff (furry fandom)
Yiff is a term popularised by the furry multi-user Internet gaming MU* community (in particular, FurryMUCK), originally intended as an onomatopoeic transliteration of a sound humorously attributed to the mating of foxes and, naturally, those who play anthropomorphic fox characters. However, while the original meaning still remains, the term quickly developed into a synonym for "sex", "sexy", "aroused", and so on, and nowadays this meaning is the most prevalent. Examples of the word's present usage include "a yiffy fur", meaning a furry who is sexually aroused or active, "yiffy artwork", meaning sexually explicit furry artwork, "to yiff", meaning to have sex, etc.
An alternative etymology exists; around the time that yiff came to exist in the furry community, an August 27, 1990 cover story in Fortune Magazine coined the term "Yiffies", describing a new breed of worker, the "Young, Independent, Freedom-minded Few" (a naming convention somewhat akin to that used with the yuppies, Young Urban Professionals). While this generation contained many of the first FurryMUCKers, the connection between the two terms is subject to speculation.