1. in a loud, noisy, and difficult to control manner; noisily and stubbornly
Usage: common in formal and informal contexts

Examples

• The children played obstreperously in the backyard, shouting and running around.
• He obstreperously complained about the service at the restaurant.
• The crowd obstreperously demanded a refund after the concert was cancelled.
• She obstreperously refused to follow the new rules.
• The protesters marched obstreperously through the streets.
• The toddler obstreperously threw a tantrum when told it was bedtime.