go-devil
Go"-dev"il, n. (Mach.) (a) A weight which is dropped into a bore, as of an oil well, to explode a cartridge previously lowered. (b) A device, as a loosely fitted plug, which is driven through a pipe by the pressure of the contents behind the plug to clear away obstructions. (c) A rough sled or dray used for dragging logs, hauling stone, etc. [Local, U. S.]