railroading an opponent straight out of the ring
Sumo term for a technique where a wrestler drives the opponent directly backward and out of the ring in a straight line, like a train on rails.
The yokozuna used a railroading technique to push his opponent straight out of the ring in one go.
押し出し is a general sumo winning technique of pushing the opponent out of the ring, while 電車道相撲 specifically describes doing so in a straight, forceful line without changing direction.
Compound of 電車道 (train track) and 相撲 (sumo), referring to the straight, unstoppable forward motion of a train.