wash one's dirty linen in public

Idioms

Also. Expose private matters to public view, especially unsavory secrets. These metaphors are reworkings of a French proverb, Il faut laver son linge sale en famille (“One should wash one's dirty linen at home”), which was quoted by Napoleon on his return from Elba (1815). It was first recorded in English in 1867.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023