ワンツースリーMeanings1nounone, two, threeUsed as a count or rhythm, often in sports, dance, or music contexts. A direct loan from English.ダンスの先せん生せいが「ワンツースリー、ワンツースリー」とリズムを取とった。The dance instructor counted the rhythm, 'one-two-three, one-two-three.'