Organist slang for any pipe/
electronic organ that is not a tracker action, and is therefore an
inferior pile of wires, circuit boards, and magnets. It is used to describe such instruments made by Wurlitzer, Wicks, Reuter, Möller, Schantz, Austin, Aeolian-Skinner, Rodgers, Allen, etc.
Usually containing a stop list of all 8' pitches, they are also called "Mud-Pits"