The definition of a ruckus is commotion or a noisy disturbance.
People yelling and getting into a fight in the middle of a movie is an example of a ruckus.
Informal noisy confusion; uproar; row; disturbance
Origin of ruckusprobably a merging of ruction and rumpus
A disturbance; a commotion: “They had shut the dogs into the cowshed to keep them from causing a ruckus” ( Molly Gloss )
Origin of ruckusPerhaps blend of ruction rumpus