[Cicero]

A donnybrook is a scuffle, fist-fight, or riot, often resulting when people have too much to drink.

[Happygal]

A Donnybrook is associated with a fist fight? *ROFL* That's so funny. Anyone who knows Ireland knows that Donnybrook is is Dublin 4 on of the most elitist residential areas in the country. They are more likely to attack each other with handbags there, than have a brawl outside the local boozer! *L*
Thanks for the explanation though! *L*
A donnybrook...sounds a very civilised way of describing a breach of the Public Order Act *LOL*