Of course his infant majesty was most obstreperous at such toilet formalities and he let everyone know it: —Habaa baaaahabaaa baaaa.
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By chance she had chosen the three most obstreperous pupils in the school to be her thieves and robbers.
Elizabeth George Speare -- The Witch of Blackbird Pond
I wanted to see him very much, and was enormously touched that he would make the long trip north, endure the uproar and dare shoulder through the swarming, obstreperous and brutal human tides of the metropolis in order to visit his only offspring.