Wiktionary
have a word
vb. (context idiomatic English) To speak to someone in private, often with a negative implication.
Usage examples of "have a word".
I will have a word with Bishop Pietro Capuletti, and see you are moved to a more worthy station.
The inspector and I must have a word with the prisoners, but you will certainly see me back at luncheon time.
I think that I will go in and have a word with Moran, and perhaps write a little note.