keep opinions to
keep (one's) opinions to (oneself)
To refrain from sharing one's unwanted or unsolicited opinions. A: "I just think this stuff about tobacco being bad for you is a bunch of nonsense." B: "Oh, keep your opinions to yourself, you old fool. No one asked you." She never hesitates to tell someone that they're wrong or to offer condescending advice. I just wish she'd keep her opinions to herself for a change.
keep one's opinions to (oneself)
to stop mentioning one's own opinions, especially when they disagree with someone else's. You ought to keep your opinions to yourself rather than upset our guests. Please keep your rude opinions to yourself!