AWAD discusses the word.
I once heard an older gentleman call the child he was
'babysitting' on a bus ride, "an obstreperous carker".
Being in high school at the time, I figured out a
carker was a "brat" or something similar, but it took
a dictionary to get me onto obstreperous. I think of
that incident whenever I see anyone escorting a child
of the same demeanor: an obstreperous carker.

----please, draw me a sheep----