noun
ritual stomping in unison by the three highest-ranking wrestlers on the final day of a sumo tournament
A sumo-specific ceremony where the three wrestlers holding the top ranks (yokozuna, ōzeki, and sekiwake) perform a synchronized stomping ritual on the last day of a tournament.
千秋楽には三役揃い踏みが行われる。
On the final day, the ritual stomping by the three highest-ranking wrestlers is performed.
Compound of 三役 (san'yaku, 'the three highest ranks in sumo') + 揃い踏み (soroibumi, 'stomping in unison'). The term is specific to sumo tradition.