[soprofaxelbis]

I would imagine a chip as being a shot which lands on the green. A bump and run is a shot that lands off the green. Generally speaking one where you would use a feature of the golf course to slow the ball down. You'll generally see them on a shot to an elevated green where the bank in front is hit into firmly so that that slows the ball down and it bounces up onto the green and runs down to the hole (at least in theory)