mod. at the end; a long time from now. (Supposedly from a tale about a child—sitting through an opera—who asks a parent when it will be over. “Not until the fat lady sings” is the answer.) : Relax. It won't be over till the fat lady sings. , This trial will be over when the fat lady sings, and that's all there is to it!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw-Hill Education.
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