Definition of ruckus noun from the Oxford Advanced Learner's Dictionary

 

ruckus

 noun
noun
BrE BrE//ˈrʌkəs//
 
; NAmE NAmE//ˈrʌkəs//
 
[singular](informal, especially North American English)
 
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a situation in which there is a lot of noisy activity, confusion or argument synonym commotion She went outside to see who was causing such a ruckus. Word Origin late 19th cent.: perhaps related to ruction and rumpus.
See the Oxford Advanced American Dictionary entry: ruckus