do (one) a disservice

do (one) a disservice

To do something that hinders or is detrimental to one. You'll really do your kids a disservice if you cater to their every whim.

See also: disservice

do somebody a disˈservice

do something that harms somebody and the opinion that other people have of them: The minister’s comments do teachers a great disservice.

See also: disservice, somebody