a piece of mind

a piece of (one's) mind

One's honest opinion or feelings, often expressing anger or frustration. I had to give Sarah a piece of my mind after she left my car a mess for the third time this week. Boy, the boss really gave me a piece of his mind after that awful meeting.
See also: mind, of, piece

a piece of (one's) mind

Frank and severe criticism; censure.
See also: mind, of, piece