Tongue-wagging is a colloquial term that refers to gossip or idle talk. There are several synonyms that can be used instead of this term. For instance, the term "chatterbox" is used to describe someone who talks excessively without any meaningful purpose. "Blabbermouth" is another term that means someone who talks too much without keeping any secrets. "Gossipmonger" is also a synonym for tongue-wagging, which implies someone who spreads rumors or makes up stories about others. Finally, the term "jabberer" is also used as a synonym for tongue-wagging, which means someone who speaks rapidly and incoherently without any clear meaning or purpose.