a home truth

home truth

An uncomfortable or unpleasant fact, especially one that is hard to hear or acknowledge. Often used in the plural. After growing tired of Paul's constant complaining, Jana decided to tell him a few home truths about his bad attitude.
See also: home, truth

a ˌhome ˈtruth

an honest criticism of a person said directly to them: It’s time someone told you a few home truths, my boy!
See also: home, truth