until hell freezes over


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until hell freezes over

also till hell freezes over
forever I will fight for these children till hell freezes over.
Usage notes: also used in the form when hell freezes over (never): They said they would get back together when hell freezes over.
Etymology: based on the idea that hell (a very hot place where people are punished forever) can never freeze
See also: freeze, hell, until

until hell freezes over

  (informal)
if you say that someone can do something until hell freezes over, you mean they will not get the result they want They can talk until hell freezes over - they won't make me change my mind.
See also: freeze, hell, until