Yiff/Wikipedia(2007-02-04)

Yiff is a slang term widely used by the furry fandom for the sexual fetishism involving furries.

According to Kansas City Pitch Weekly, 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.