Is there an idiom for something that will never happen?

Question

Inspired by this question on English SE, and the List of idioms of improbability in Wikipedia which does not have an entry for Japanese, I was wondering... Is there an idiom in Japanese for something that will never happen?

score 0 · Answer 1 · answered Mar 19 '18 at 00:30

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This one is not strictly 'never', but it does indicate very low probability:

瓢箪から駒 (ひょうたん　から　こま) a horse from a gourd

answered Mar 19 '18 at 00:30

kandyman

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score 0 · Answer 2 · answered Mar 19 '18 at 00:36

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This one's in jisho.org with the definition of "when pigs fly", which is one of the English idioms that means the same thing:

百年河清【ひゃくねんかせい】を待つ -> Waiting a hundred years for the Yellow River to clear

answered Mar 19 '18 at 00:36

bcloutier

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Is there an idiom for something that will never happen?

2 Answers2