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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1) (noun) Sound supposedly made by mating arctic foxes.
2) (acronym) (or more backronym) YIFF or Y. I. F. F. - "Young Incredibly Fuckable Furry"
3) (proper name) YIFF sound server. Program for Linux to help handle audio.
4) (noun) More or less (usually more) sexual act. Commonly used by furries, usually denotes standard intercourse but may denote any kind of sexual behaviour between any type and number of parties (imaginary anthro creatures, humans, animals, even inanimate objects like plushies). Antonym: Yerf.
5) (verb) Like in meaning 4, "to yiff".
6) Furry (or otherwise) artwork depicting yiff as in meaning 4.
7) Expression of joy (by furries)
8) Non-invasive question about sexual feelings/will to mate.

Note in all sexual meanings this has a very specific emotional background: It's neither considered vulgar (like "fuck" or technical (like "have intercourse") or emotion-less (like "make love"). It's playful, considering the act like something fun, nice, pleasant and not very important - without any special obligations attached to it. "Let's yiff" has about the same emotional background as "Let's play".

See also yiffy
1) I heard foxes making the "yiff" noises.
2) He's a Y.I.F.F.
3) I've upgraded the yiff server.
4) Are you into yiff, or just cuddles?
5) Let's yiff.
6) It's hard to find good yiff on VCL nowadays.
7) I did it! Yiff-yiff-yiff-yiff-yiff!
8) "Yiff?" "No, thanks, I don't quite feel like this right now."
by SharpFang August 20, 2003
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The Furry Fandom's word for Sexual Intercourse, where two furs have a sexual affair. The word originates from the noise a fox creates when it mates. The phrase is used for sexual acts universally involving furries, not just specific acts.
"The lion wanted to yiff the wolf, which was blatantly obvious due to the growing package in his pants, his sheath revealing an ever-shy member."

"The wolf explained to his furry friends about how yiffy he felt by simply standing near his lion friend."

"The canine yiffed the feline in a pleasurable matter, resulting in loud purrs and murrs of great enjoyment."
by Caleb Griffith September 21, 2006
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a yell and a sniff combined; a yiff.

it was created by stephanie from GTlive during a let's play of the game dayshift at freddy's, when she claimed that a yiff was a yell and a sniff at the same time, even though she did not know what it actually meant at the time. other definitions under this word will most likely explain the original definition.
"don't yiff the fox"
"yiffing the fox is prohibited"

"the fox was yiffed"
by inkx0c January 30, 2022
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to yell and sniff near-simultaneously
Mathew yiffed a fresh cake that had stolen his wallet.
by Kat9 November 13, 2016
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Drawn porn featuring furry characters. Extremely repulsive and disturbing to some, exciting and alluring to others. Animalistic traits refined by evolution serve to compliment conventional human sexiness (expressed in body shapes, facial expressions, situational context and etc.) resulting in wild variety of lustful self-expression. All genders, sexualities, fetishes and species are present, once you're hooked you'll have a lot to choose from.
Being attracted to yiff typically doesn't mean being a zoophile since most of such art features humanlike bodies and stylized muzzles expressing human emotions. That said, there's also such thing as feral yiff.
Lots of people make money drawing yiff comissions but there are also a lot of artists creating such art just for the sake of it. Measuring the sheer volume of yiff content produced daily is currently impossible.
Alex: my yiff fantasy is that my jackal fursona is caught between a female fox and a male wolf. She's foxily slender and has nice hips & tits, he's much more muscular than me and also larger. We're kissing and touching each other, then she lies on her back and I start entering her just as the wolf guy penetrates me while growling in my ear... shit, that's awesome, why can't I draw? Guess I'll commission it.

Some people think yiff signifies our species' growing interest in transhumanism.
by Siberian Lynx June 15, 2019
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To yell and sniff
"He yiffed me and told me I smelt like cheese"
by MatPat Inpersonator October 21, 2019
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