From Longman Dictionary of Contemporary Englishnever/not in a million yearsnever/not in a million yearsspokenNEVER used to say that something is extremely unlikelyNever in a million years did I think we’d lose. →year
Examples from the Corpus
never/not in a million years• You won't get Kieran to agree - not in a million years!• He was rich as Croesus, something he had never expected to be, not in a million years.• You'd never in a million years see a dancing man in a field in the country.• There was no point in all of this: she would never believe him. Not in a million years.• Never. Not in a million years.• No parent is going to believe this pigtail story, not in a million years.• I still had to find Wally and attempt to explain what I would never in a million years be able to explain.• It is based on a true story so outrageous that it would never in a million years have passed muster as fiction.• The realreason for her lack of promotion, she knew, would never in a million yearsoccur to him.