noun
brawl; scuffle; free-for-all fight
A noisy, chaotic fight involving multiple people; often used for public disturbances or sports-related melees.
試合の後、観客席で乱闘騒ぎが起きた。
After the match, a brawl broke out in the stands.
酔っ払い同士の乱闘騒ぎで警察が呼ばれた。
The police were called because of a drunken brawl.
乱闘 is a brawl or melee; adding 騒ぎ emphasizes the noisy, disruptive nature of the event.
Compound of 乱闘 (brawl) and 騒ぎ (noise, commotion).