1 definition by manimorgan19@

Yiff / yip - the noise a (fox) makes when mating

Yiffer - a Furry* (below) who enjoys engaging in sexual activity while in their fursona/suit. They may or may not use the noise, and may or may not use their full fur suit or a partial, such as just the head or just the tail etc.

*an enthusiast for animal characters with human characteristics, in particular a person who dresses up in costume as such a character or uses one as an avatar online.
"People tend to look down on yiffers, comparing them to bestiality"

"My friend Tanner was a yiffer but he kept it mostly to himself"
by manimorgan19@ June 26, 2023
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