[give one a piece of one's mind] {v. phr.}, {informal} To scold angrily; say what you really think to (someone).
* /Mr. Allen gave the other driver a piece of his mind./* /The sergeant gave the soldier a piece of his mind for not cleaning his boots./
Syn.: TELL OFF. Compare: BAWL OUT, DRESS DOWN, GIVE IT TO, TONGUE LASHING.