Learn how to say Chattering correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word chatter:
to make short, indistinct sounds in rapid succession ⇒ birds and squirrels chatter
to talk fast, incessantly, and foolishly
to click together rapidly, as the teeth do when the lower jaw trembles from fright or cold
to rattle or vibrate ⇒ an improperly adjusted tool chatters