Logrolling

Part of speech: noun (n.)

1. The act or process of rolling logs from the place where they were felled to the stream which floats them to the sawmill or to market. In this labor neighboring camps of loggers combine to assist each other in turn. Longfellow. [U.S.]

2. Hence: A combining to assist another in consideration of receiving assistance in return; -- sometimes used of a disreputable mode of accomplishing political schemes or ends. [Cant, U.S.]