If you refer to something that a group of people talk about as tittle-tattle, you mean that you disapprove of it because it is not important, and there is no real evidence that it is true.
[disapproval]
...tittle-tattle about the private lives of minor celebrities. [+ about]
Synonyms: gossip, rumour, dirt [slang], goss [informal, slang] More Synonyms of tittle-tattle
More Synonyms of tittle-tattle
tittle-tattle in British English
noun
1.
idle chat or gossip
verb
2. (intransitive)
to chatter or gossip
Derived forms
tittle-tattler (ˈtittle-ˌtattler)
noun
tittle-tattle in American English
(ˈtɪtəlˌtætəl)
noun, verb intransitiveWord forms: ˈtitˌtle-tattled or ˈtitˌtle-tattling