Unidentified substance found at the back of a fridge/ car boot/ toxic waste depository that will
make a great bet if you ask someone to drink it.
"In further news police have seized 70 tons of yif from a prominent drug cartel"
by Toasttheoverlord January 24, 2019
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Used to express when one has had enough "Yiffing"
"I'm not performing like I normally do, I'm really yiffed out"

"She said something about being yiffed out, I guess she was up all night on the computer"
by Diamondback25x November 20, 2009
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When you take a big sniff of a dick you are yiffing dicks
Alex loves yiffing dicks
by Dick yiffer 9000 January 22, 2016
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When a guy sniffs a girls rectum and he inhales a wet slap of feces .
I gave Mrs. G an anal yiffing .
by Tha Sergio January 10, 2012
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