when pigs have wings

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when pigs have wings

At a time that will never come to pass. (Used to show skepticism or cynicism over someone's hypothetical remark.) Bob: "If we could just get Democrats and Republicans to agree on a tax reform bill, we could bring the deficit down in no time." Dave: "Sure, when pigs have wings!"
See also: have, pig, wing
References in periodicals archive ?
Neither kosher nor halal, the unusual catch of a Palestinian fisherman is the source of quite a few chuckles in the Euro-financed, Gaza-set "When Pigs Have Wings.