Sentence:  "It's just a list of furs who enjoy more adult, ie. <WSD>yiffy</WSD>, subject matter." &mdash; [http://groups-beta.google.com/group/alt.lifestyle.furry/msg/59813bf1293310dd] 
Meaning of the word marked with <WSD> tags:  Of or pertaining to yiff (sexual intercourse among furries).