air one's grievances

Idioms  

1. Complain publicly, as in Jane was afraid to complain at work but freely aired her grievances at home. This figurative exposure to the open air is far from new; to air one's opinions or ideas dates from the early 1800s, and the precise idiom appears in James Joyce's Ulysses (1922).

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Example Sentences

In fashion, it is considered poor form to air one’s grievances in public, let alone at a party, and directly to an editor in chief; and yet Mr. Posen, in his meteoric career since founding his company in 2001, around the time of his 21st birthday, has never allowed decorum to stand in the way of his tongue.

From New York Times