Definition of "Chatter" :

noun: noisy talk

noun: the high-pitched continuing noise made by animals (birds or monkeys)

noun: the rapid series of noises made by the parts of a machine

verb: speak (about unimportant matters) rapidly and incessantly

verb: make noise as if chattering away

"The magpies were chattering in the trees."

verb: talk socially without exchanging too much information

verb: cut unevenly with a chattering tool

verb: click repeatedly or uncontrollably

"Chattering teeth."