expression
upset victory; undone victory
Sumo term for a win that is overturned or considered invalid due to a rule violation or irregularity, often after a mono-ii (judges' conference).
物言いの末、乱れ勝ちとなった。
After a conference, it was ruled an upset victory.
物言い is the judges' conference itself, while 乱れ勝ち is the resulting overturned victory.
Compound of 乱れ (disorder) and 勝ち (victory), literally 'disordered victory'. The exact origin within sumo terminology is uncertain.