1. noisy and difficult to control; unruly and defiant

Examples

• The obstreperous children refused to sit quietly during the assembly.
• His obstreperous behavior in class led to a meeting with the principal.
• The obstreperous crowd had to be removed from the courtroom.
• She became increasingly obstreperous when told she couldn’t have dessert.
• The obstreperous protesters disrupted the peaceful rally.
• His obstreperous attitude made it difficult for anyone to work with him.