far outside; wide outside
Horse racing term for a position or course far on the outside, away from the inner rail.
その馬は大外から追い込んで勝利した。
The horse came from far outside to win.
大外を回るとロスが大きい。
Going wide on the outside causes a big loss.
Compound of 大 (おお, 'big') and 外 (そと, 'outside'), literally 'big outside'.