A troublesome, energetic, and aggressive person: He's a holy terror around the house(1887+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with 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