Expresses strong emotions and frustration towards someone's actions, not just casual feedback. After the third time he broke his promise, I gave him a piece of my mind.
Pro Tip 2/3
Colloquial Usage
Commonly used in informal situations among friends or family, but may be too direct for formal contexts. I finally gave my noisy neighbor a piece of my mind last night.
Pro Tip 3/3
Impulsive Reaction
Sometimes done impulsively when someone is fed up with a situation; could later lead to regret. She didn't think before she gave her colleague a piece of her mind about the messy desk.