speak out of turn
To say something erroneous, foolish, or impudent at an inappropriate time, or to speak when one does not have the authority to do so. I hope I'm not speaking out of turn, but I think we'd see a higher profit margin if we took better care of our employees' benefits. If you speak out of turn in my class, you can expect detention!
speak out of turn
Fig. to say something unwise or imprudent; to say something at the wrong time. Excuse me if I'm speaking out of turn, but what you are proposing is quite wrong. Bob was quite honest, even if he was speaking out of turn.
speak (or talk) out of turn
speak in a tactless or foolish way.