wash dirty linen (laundry) in public
To air private problems where they can be seen or heard by all: “The company may have real problems, but it's unfortunate that the directors have chosen to wash their dirty linen in public through the press.”
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.