What is "chinning"

Usage examples of "chinning".

He was across the room, chinning with a broad-shouldered six-footer maybe thirty years old, with a slightly pushed-in nose and a vacant look to go with it.

The police car there had been joined by another one, and the taxi was still parked down a ways, and as I crossed the sidewalk to the stoop I saw the dick there with his foot on the running board, chinning with Cramer's chauffeur.

The chances are this time she was back chinning with the chorus girls while they dressed.

I thought she'd been chinning with the chorus girls, but now when I think about it, I know they'd all have gone home by that time.

Then he reached his left hand up to join his right, and pulled himself up like a gymnast chinning the bar.