cook up

cook up idiom
Fabricate, concoct, as in She's always cooking up some excuse. [Colloquial; mid-1700s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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