come clean

come clean idiom
Confess everything, as in If you come clean about what happened I will promise to keep it to myself. [Slang; early 1900s]

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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