chit-chit-chatn.
Etymology: Imitative of the sound meant: compare chit v.2 and chit-chat n.
1608 J. Sylvester tr. G. de S. Du Bartas (new ed.) ii. iv. 120 Then flyes the shame-less Bat Among the Birds, and with her Chit-chit-chat Shee seems to sing.
This entry has not yet been fully updated (first published 1889; most recently modified version published online September 2019).