Symptoms
A common symptom of ODD (synomon to vexation)
Anger
A common symptom of ODD (synomon to touchiness)
irritability
A common sypmtom of ODD (synomon of expostulate)
Arguing
How do they treat authority?
They argue and refuse to do what they say.
When does it stop?
It can stop in childhood, but theres a chance it continues through adulthood.