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 amp; rumpus
A disturbance; a commotion: “Little was heard by us in the upper regions of the considerable ruckus (and surely the heartbreak) being endured some floors below” (Brendan Gill).
Origin of ruckusPerhaps blend of ruction and rumpus.