have a word with

[have a word with] {v. phr.} 1. To talk, discuss, or speak brieflywith.

Robert, I need to have a word with you about tomorrow'sexam.

2. To engage in a sincere discussion with the purpose ofpersuading the other person or let him or her know of one'sdissatisfaction.

Our boss has been making funny decisions lately; Ithink we ought to have a word with him.