Yiffer 

Noun: Someone who likes to yiff; to yiff frequently

Matt is such a yiffer.

Yiffer by Lupis Lupine July 25, 2003

Yiffer 

(Yiffer)Pronounced (Y-I-ph-r)-see (Furry) Slang for Furry. Basically Yiffers are hardcore furrys who dress up in animal costumes and have orgys. Yiffers have an unhealthy obsession with human like animals and have massive "Fur Conventions" and Furry Hentai websites. It is common for them to display animal characteristics. In many cases Yiffers think they are an animal like a fox or wolf, trapped in a human body.
*Not to be confused with beastuality.... but both equally screwed up

That guys a Yiffer! He just growled at me!

Yiffer by Leafman April 18, 2009

Yiffer 

A very strong cocktail. When you make a mixed drink and put too much alcohol in it.

*takes a sip*

Wow, quite the yiffer you got there

Yiffer by Cnormand13 July 18, 2016

yiffer 

pumpkin

"oh em gee did you know pumpkin is a yiffer?" person 1
"oh em gee really??!?" person 2

yiffer by pvmpkinzisayiffer December 19, 2021

Yiffer 

A sad excuse for a human being or beings, that would be deemed pitiful, otherwise normally freakish, if it weren't for their afinity to mate with species other than their own kind.

As the yiffer was housesitting a friend's house, so the buddy can run errands, he cut a hole into the friend's teddy bear, f'd it, placed it back on the shelf and pretended that nothing happened when the friend returned.

Yiffer by TG July 31, 2004

Yiffer 

Agree used as an inverse of Differ in the term I beg to differ

Guy One-"That's cool"
Guy Two-"I beg to yiffer"

Yiffer by Elliottt January 6, 2008

Yiffer 

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"

Yiffer by manimorgan19@ June 26, 2023