Top definition
Connected with Anthropomorphology, yiffed is the past participle of yiff. (That means that it is the past tense of yiff) When two or more anthros have mated, you say, they have yiffed

Yiff, Yiffing, Yiffed. In that order
When we finally got home we yiffed all night.
by Player May 06, 2005
Get the mug
Get a Yiffed mug for your mother-in-law Riley.