Definition of "complainer" []

• One who complains, or is known for their complaints. (noun)

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• "One complainer is someone I frequently quote, Anne Munoz-Furlong, founder of the Food Allergy & Anaphylaxis Network (FAAN)."
• "If the complaint was that ethnic minorities were not represented as sexy, would we call the complainer fetishistic?"
• "It's eye-opening to hear him describe how he was forced to insert the following theme into every episode: The group is always right ... the complainer is always wrong."