when pigs fly

== English == === Alternative forms === when pigs can fly === Etymology === Referencing the fact that pigs do not have wings and cannot fly. === Pronunciation === Rhymes: -aɪ === Adverb === when pigs fly (idiomatic) Never. Synonyms: see Thesaurus:never ==== Translations ==== ==== See also ==== pigs might fly camel through the eye of a needle a cold day in Hell ad kalendas Graecas first of never never in a month of Sundays snowball's chance in hell when Hell freezes over