yiff is a valid English word

Scrabble validity: invalid ( international - Sowpods, US - Twl06 )
iScramble validity: invalid
QuickWords validity: invalid

Meanings

Interjection

(onomatopoeic apocryphal) Representing the bark of a fox (especially while mating).
(of a person informal) To express happiness, to state that something is sexy.

Noun (USUALY UNCOUNTABLE)

(slang informal) Sex, especially between furries (fictional anthropomorphic animal characters, and/or members of the community surrounding their celebration).
• "FurryMuck yiffs are like real-life yiffs - there is a time and place for everything." — [http://groups-beta.google.com/group/alt.fan.furry/msg/4e094a46fba477cd]
(slang informal) Pornography of or involving furries.

Verb

(ambitransitive slang informal) To have sex, to mate (said of animals, especially foxes, or people dressed up as animals).
(transitive and intransitive slang informal) To propose cybersex to someone.

yiff is not a Scrabble valid word

yiff

• International English (Sowpods) - The word is not valid in Scrabble ✘
• US English (TWL06) - The word is not valid in Scrabble ✘
• 00 points

yiff is not an iScramble, QuickWords valid word

yiff

• The word is not valid in iScramble ✘
• The word is not valid in QuickWords ✘
• 00 points

Same letters words (Anagrams)

• FYFI
• IFFY

Same letters plus one

• BIFFY
• FIFTY
• GIFFY
• JIFFY
• MIFFY
• NIFFY
• RIFFY
• TIFFY
• YIFFS
• YIFFY

Same letters minus one

• FFI
• FIF
• FYF
• FYI
• IFF
• YIF