Definition of «angry letters»

The phrase "angry letters" refers to written messages or notes that are filled with strong negative emotions, such as anger or frustration.

They called, emailed and sent angry letters to the editor complaining about the policy. (publishingperspectives.com)
Never underestimate the power of angry lawyers to send angry letters. (lawyerist.com)
The photo prompts several angry letters from readers who feel the stunt is demeaning to real estate professionals. (remonline.com)
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