- "Now I'm a big believer in 'live and let live', but when somebody comes after one of my friends brandishing a bloody chainsaw, we're gonna have issues."
A chainsaw is a mechanical saw used for cutting up wood. It is used by lumberjacks and landscapers who need to cut through thick tree trunks, branches and timber. It is also used to help chop up firewood. A chainsaw typically uses a two-stroke gasoline engine and a cutting chain secured to a guide bar on top of rollers.