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When fans in the stands commandeer control over the judging, reffing or umpiring of a sports event, usually through jeers, boos and other forms of verbal intimidation.
When fanarchy broke out in the stadium, the judges gave a higher score to the gymnast.
by lbscales August 24, 2004
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When fans of a sport, usually football (soccer) cause mayhem after a match
When they won it was complete fanarchy

Fanarchy in the streets after their team won the cup

He trashed the pub in a moment of fanarchy
by Cosmicwatchmaker July 08, 2018
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