Yiff

Yiff is a slang term used in the furry fandom to refer to pornographic content of anthropomorphic animal characters. It is considered a tongue-in-cheek term in the furry fandom. The term is also used as a way to insult members of the furry fandom, such as in the phrase "yiff in hell". The term is also used in the plushie fetish community.

Furry conventions usually have strict policies regulating where yiff artwork can be displayed or sold. According to Google Trends, Google searches for the term were more prevalent during the 2000s, but steadily declined overtime with only a brief rise during 2020.

History
The origin of the term is unclear. However, yiff has been in the fandom since the 1990s.

It is also thought to originate from a role player named Foxen, who created Foxish, a constructed language invented for use during online furry roleplaying. It was originally intended as a general-purpose expression of excitement or happiness, but became conflated with the term yipp, which carried sexual implications.

The CSI episode "Fur and Loathing", which aired on October 30, 2003, increased awareness of the term outside of the furry fandom. The word yiff became mainstream later that decade from anti-furry rhetoric on sites like 4chan.