The "Airing of Grievances" is a concept popularized by the television show Seinfeld, particularly in the episode titled "The Strike." It refers to a practice where individuals express their complaints or frustrations about others, often in a humorous or exaggerated manner. This concept is part of the fictional holiday called Festivus, which was created by the character Frank Costanza. During the Airing of Grievances, participants share their disappointments with friends and family, highlighting specific actions or behaviors that have upset them. This event serves as a way to confront issues openly, allowing for catharsis and resolution, albeit in a lighthearted context.