A "fervert" is a person who dresses-up to mimic the look of a furry mammal animal with a tail; often, the person will also mimic mannerisms or movements of the furry mammal being mimicked. For female persons who dress as “ferverts”, the tail is often raised into a position where sexual relations are overtly suggested. Male persons who dress as “ferverts” often do not exhibit the raised tail attributes. The “Fervert” term was coined at Comic Con 1996 as a derisive word; the related term “Furvert” is a more modern form of the same word coined minutes later; “Furvert” was immediately adopted at the time, and is not considered to be a derisive term. “Furvert” more closely matched that which was observed at the time.
That "fervert" should not dress-up like a furry animal with a tail! I find "ferverts" to be sexually attractive.