Define Go Ballistic Meaning

Going Ballistic
Becoming fully, truly, unstoppably, gravitationally angry. Usually of a person or semi-sentient animal that can experience anger.
References ballistic missiles, whose flight paths are nearly un-alterable after a certain point.

"When dad finds out I didn't submit my college applications, he'll be going ballistic!"
By Marjorie
Go Ballistic
Get very angry, such that you lose your self-control.

I wouldn't start by telling her that you actually slept with Rachel. She'd go ballistic and you'd never be able to explain the rest.
By Daffie