mouton à cinq pattes

== French == === Etymology === Literally, “five-legged sheep”. === Pronunciation === IPA(key): /mu.tɔ̃ a sɛ̃k pat/ === Noun === mouton à cinq pattes m (plural moutons à cinq pattes) (idiomatic) unicorn; black swan; flying pig (a kind of chimera that doesn't exist)