keep (your) mouth shut

informal

to keep something secret.

You can trust Sarah - she knows how to keep her mouth shut.

Do you think I should keep my mouth shut about seeing Jim with another woman? (sometimes + about)

• try your hand at something
• try your luck
• try your wings
• tub-thumping
• tucked away
• tuck in
• tuck in someone
• tug at heartstrings
• tug at your heartstrings
• tuned in
• tuned in to
• tuned in to someone
• tuned in to something
• tune in
• tune in to
• tune in to something
• tune out
• tune out someone
• tune out something
• tune up
• tune up for
• tune up for something
• tune up something
• turf war
• turkey shoot