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Vernacular, used by furries, meaning, "I would like to have sexual relations with that person, while we're both wearing fur suits."
"Look at that fursuit, I'd yiff that."

"Stick a tail on her, and I'd so yiff that."

"That chicks a Foxx, I'd yiff that."
by Confusion May 03, 2006

Words related to I'd yiff that

furries furry i'd hit that yiff yiffing