(really) let--(him/her/them/..) have it

Examples:

1. He really let her have it about calling him a liar.


2. The next time she's late, you should really let her have it - you know,
yell at her and tell her if it happens again she'll be fired.


3. A neighbor of mine who is ninety really let someone have it for letting their
dog poop on her lawn.


4. Lately I've been trying to control my temper. When I feel like I'm about to
really let someone have it, I take a deep breath, count to ten, anything to keep
from losing my temper.