A fight or ruckus. Usually with a group of people. It is smaller than a brewhaha, but larger than a fight.
"Those two starting to argue and before I knew it, I was in the middle of an oldschool donny brook."
by ...rockstar... June 06, 2007
The line brawl between the New Jersey Devils and the New York Rangers turned into a pretty good Donnybrook!
by DevilsGirl May 12, 2013
by Conor Taylor January 19, 2004
The word that gives the irish, and the college sports programs the Irish reputation for brawling. A donnybrook often takes place in a pub(bar) or on some occasions, the house of an Irish family. A donnybrook often involves heavy alcohol use, and anybody in the place the donnybrook happens. The end of a donnybrook usually results in missing teeth, lacerations to the head, scars, scrapes, and bruises to the body. If you ever hear of a donnybrook starting at the place you're in, either run, or participate and be prepared for all of the above fleshwounds the next morning.
by Mr. 695-Miffles-bot August 01, 2016
by womoma April 17, 2005