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who knows what

see under what have you.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

Examples from the Web for who knows what

Historical Examples of who knows what

  • Like mushrooms, in a single sight we spring up—a pen in our hands, very little in our brains, and who-knows-what in our hearts!

    The Complete Essays of John Galsworthy

    John Galsworthy

  • The little model gave him a look with who-knows-what of reproach in it, and, faithful to her training, went submissively away.

    Fraternity

    John Galsworthy