Green’s Dictionary of Slang

to chatter, to gossip.

1821		Egan Life in London (1869) 190: The peep o’day Woman of Quality [...] is here to be seen riding round the circle to chit-chat and nod to her friends, in order to get rid of her yawnings.
1959		A. Anderson ‘A Sound of Screaming’ in Lover Man 35: After we’d chit-chatted a while she said, ‘Well, I reckon we’d best get started’.
1972		(con. 1916) G. Swarthout Tin Lizzie Troop (1978) 142: I’m supposed to escort you upstairs to chit-chat with the old man. He’ll tell you.
1972		O. Hawkins Ghetto Sketches 126: Everything is cool … we stand in the checkout line, chit-chattin’.