an inordinately wild fight or contentious dispute; brawl; free-for-all.
The line brawl between the New Jersey Devils and the New York Rangers turned into a pretty good Donnybrook!
by DevilsGirl May 12, 2013
A donnybrook is most widely known as it relates to hockey. When teams get into a bench clearing brawl with multiple players fighting it other the commentators refer to it as a 'donnybrook'
Last nights game between the Las Vegas Knights and the Colorado Avalanche turned into one hell of a donnybrook when both teams benches emptied!
by brytor February 23, 2019
A fight or brawl....
i lost a few teeth in that donnybrook last night.
by Conor Taylor January 19, 2004
a place in Dublin full of stuck up,rugger buggers and cunts
Im from Donnybrook, Im so much better than you, ya kneaww?
by womoma April 18, 2005
No one is quite sure...but it probably involves a lot of peanut butter and jelly, and some alcohol on the side.

"The neighborhood is so annoyed with Donnybrook jig"
by Waseda Oregon 2007 September 15, 2007