obstreperous /əbˈstɹɛp.əɹ.əs/ adjective2 •Attended by, or making, a loud and tumultuous noise; boisterous.[O]n a clear still summer evening you may hear from the battery of New York the obstreperous peals of broad-mouthed laughter of the Dutch negroes at Communipaw. — 1809 •Stubbornly defiant; disobedient; resistant to authority or control (whether in a noisy manner or not).[W]e came to Whittingham. Thence to Newcastle, where an obstreperous horse retarded us for an hour at least. — 1827 formsmore obstreperous · most obstreperous