set tongues wagging

set tongues wagging {infml} (to do something that people will talk about in an unkind way; to cause people to start talking about somebody's private affairs) — вызвать толки, сплетни, разговоры

Example 1: Her sudden resignation set tongues wagging.

Example 2: The affair between the boss and her accountant set tongues a wagging.

Example 3: If you get married soon, you will set tongues wagging in the neighborhood. Your marriage will certainly set tongues wagging. —... пойдет молва, пойдут разговоры по округе/ будут судачить об этом на каждом углу.

tongues wag