Here's a breakdown of the meaning:
* Tongues: This refers to people's mouths, specifically their ability to speak and gossip.
* Wag: This implies movement, like a dog wagging its tail, suggesting that people are actively talking and spreading information.
Examples:
* "Her sudden resignation caused tongues to wag around the office."
* "Their whirlwind romance has caused tongues to wag in the neighborhood."
* "The celebrity's outrageous outfit caused tongues to wag on social media."
Essentially, it means that something has happened that has made people talk about it, often in a gossipy or speculative way.