A bone saw is a tool, typically an electric band saw, used to cut bones and meat, especially in butcher shops. Figuratively, and often jokingly or derogatorily, it can refer to a surgeon.
More detailed definition
In the professional context: The bone saw is an indispensable piece of equipment in butcher shops, fishmongers, restaurants, and industrial kitchens. It is used to cut bones from slaughtered animals, making it easier to prepare cuts of meat for sale or consumption.
Construction: It is usually a machine with a band saw stretched between two rotating pulleys, guided by a support table for the material to be cut.