interrog. a formulaic challenge indicating disagreement with someone who has said something. (See also Says you!) TOM: Says who? FRED: Says me, that's who! : She drew herself up to her full height, looked him straight in the eye, and said, “Says who?”
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw-Hill Education.
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