Definitions for "Yiff"
Yarf Infected Furry Fan
1. (n.) Yiff is said, in furry legend, to be the sound an excited fox makes, especially when mating with a fine vixen. Thus, yiff has drawn many sexual connotations in the furry world. Yiff can be the act of sex, sex itself, or simply an expression or exclamation as in "Yiff!" 2. (v.) The act of yiffing, mating, lovemaking, etc. Also, to make the sound "yiff" as an onomatopoeia.