Walls have ears

Cultural  

1. We may be overheard without our knowing it.

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This saying is a warning to persons who share secrets.

Example Sentences

In case the walls have ears, they speak in code — escapees collectively are “The Library,” individual fugitives “Books,” their hiding places “Shelves.”

From Washington Post

A former secondary school teacher who has lived in Hong Kong for more than a decade said although she loved the city and its people: “I don’t want to live somewhere where the walls have ears.”

From The Guardian

Now we are free, before we lived in fear and said "the walls have ears".

From BBC

Walls have ears; you never know who might be listening.

From The Guardian

“When we were growing up our parents said, ‘Shut up, the walls have ears,’” said Mohammed al-Amin, a second-year medical student who was working at one of the first aid stations, treating protesters suffering from tear gas and pepper spray exposure.

From New York Times