Go-Devil

Part of speech: noun (n.)

1. A weight which is dropped into a bore, as of an oil well, to explode a cartridge previously lowered.

2. 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.

3. A rough sled or dray used for dragging logs, hauling stone, etc. [Local, U. S.]