Obstreperous (adjective)

1. Noisy and difficult to control.
2. Boisterous and unruly.
3. Loud and troublesome.
4. Resistant to control or restraint.
5. Rude or aggressively defiant.

Origin:

Derived from the latin word obstreperus, meaning 'noisy, tumultuous, unruly'.

Examples:

1. The obstreperous crowd disrupted the concert, making it impossible to hear the music.
2. The obstreperous children were sent to their rooms for misbehaving at dinner.
3. The obstreperous dog refused to be silenced, barking loudly at every passerby.
4. The obstreperous protesters made it difficult for the police to maintain order.
5. The obstreperous customer was asked to leave the store for causing a disturbance.