noun
hand touching the ground resulting in direct loss
Sumo term: a wrestler loses immediately when their hand touches the ground before their opponent does, often from a failed throw or slip.
投げを打ったが、先に掃き手になって負けた。
He attempted a throw, but his hand touched the ground first, resulting in a loss by 掃き手.
土俵際でバランスを崩し、掃き手で勝負が決まった。
He lost his balance at the edge of the ring, and the match was decided by a 掃き手.