(Adj.)Noisy, unruly, disorderly.
PCP also releases adrenaline so users become immensely strong; if they become obstreperous they often need several people to control them.
The obstreperous children made it hard for their parents to take them anywhere.
The obstreperous children made it hard for their parents to take them any where.
obstreperous means noisy or out of control
Obstreperous means loud, unruly and turbulent! So basically, it is being (it's an adjective) loud and uncalled for (unnecessary).