gabble
gab-ble
verb
To speak quickly and indistinctly, making it difficult to understand.
"She tends to gabble when nervous."
noun
Rapid, indistinct, and often meaningless speech or sound.
"We heard the gabble of the crowd."
Thesaurus
Synonyms: jabbering, jabber, tattle, prate, gibber, maunder, clack, tittle-tattle, palaver, blabber, twaddle, blab