a holy terror
A very troublesome, aggressive, or aggravating person; a person who is exasperatingly difficult in manner or behavior. I know that I was a holy terror when I was young, so I guess it's fitting that my own kids give me so much trouble.
holy terror
An exasperating individual, as in He was only five, but he was a holy terror, running wild through the house and throwing whatever he could lay his hands on . The adjective holy here is an intensifier. [Late 1800s]
holy terror
n. a devilish person; a badly behaving child. Why is the boss such a holy terror today?