chitter-chatter

/CH IH1 T ER0 CH AE0 T ER0/
noun
  1. 1

    Light and lively discussion.

  2. 2

    Talk about trivial or nonsensical matters; inconsequential or incessant conversation.

  3. 3

    The chattering of teeth due to trembling, shivering, etc.

verb
  1. 1

    To talk trivially, nonsensically, or incessantly.

Source: https://en.wiktionary.org/wiki/chitter-chatter