A combination of yikes, yuck and the f-word. An exclamation of intense astonishment. Followed by two exclamation points.
Yiffes!! You're pregnant with Anderson Cooper's lovechild?
by metssox April 18, 2007
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Is a disgusting, and horrible thing created by Furries. It is pornography containing animals fucking each other or humans which strongly encourages the disgusting acts of bestiality also known as zoophilia and needs to be stopped along with the furries. Categories include but are not limited to: bestiality (human on animal), cub porn (infant animals), and many fetishes.
Person A: Have you heard about Yiff?

Person B: You mean the people that fuck dogs

Person A: Yeah, I’ve recently found out about it and i’m sickened to my core

Person B: I know, it’s normalizing a crime and must be stopped
by Dr. Ludwig July 8, 2021
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A word used by furries which actually means "yell and sniff", but furries use it as a verb which means "having sex".
Furry guy 1: hey, wanna yiff?
Furry guy 2: sure! *yiffs Furry guy 1*
by Awooooooooooooooooos December 28, 2018
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Yiff in Hell” is a phrase used by those that oppose the furry fandom, directly aimed towards furries as a message to take the activities commonly associated with yiffing elsewhere

On 4chan, “Yiff in Hell” is typically found in Furry threads, used as a protest towards furries in an attempt to lower the amount of furry content posted on the site. While it has been seen spammed throughout threads in great numbers, certain self-identified furries have offered rebuttals stating that the argument doesn’t make sense

This is the proper meaning, rather then the "Other ones" trying to insult the Furry Fandom
Internet User: Yiff in hell furfag!
Furry: Does your swag raise money for charity?
by Another Goddamn Furry June 5, 2015
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A person with a crippling addiction to furry porn, yet denies that they are a furry.
“Damn bowerystyles is definitely a furry

“I’m not fucking furry, ya dumb cunt!”

“Oh, sorry Dr. Yiff”
by ZooCrew62 November 9, 2020
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