noun
Fosbury flop
A high jump technique where the jumper arches their back over the bar. Used in athletics contexts.
彼は背面跳びで自己ベストを更新した。
He set a new personal best with the Fosbury flop.
Compound of 背面 (はいめん, 'back side') and 跳び (とび, 'jump'), describing the back-first jumping technique.