noun
backward pivot throw (sumo)
A sumo technique where the wrestler leans back and pivots to carry the opponent around and out of the ring.
横綱はうっちゃりで逆転勝ちした。
The yokozuna won by a reversal with an utchari throw.
noun
last-minute reversal; turning the tables at the last moment
Figurative extension from sumo; used for a dramatic comeback or overturning a situation when defeat seemed certain.
彼は最終回にうっちゃりを決めて契約を勝ち取った。
He pulled off a last-minute reversal in the final round and won the contract.
逆転 is a general word for reversal or turnaround, while うっちゃり specifically implies a dramatic, last-moment overturning, often with a physical or competitive nuance.
Derived from the sumo technique うっちゃり, from the verb 打っちゃる (utcharu, 'to throw away' or 'to discard'), referring to the motion of throwing the opponent out of the ring. The figurative sense comes from the idea of a sudden, decisive reversal.