do a Devon Loch(redirected from doing a Devon Loch)
do a Devon Loch
To achieve a sudden and unexpected failure or loss at the last minute, especially in sports. (Devon Loch was a horse poised to win the 1956 Grand National when he suddenly leapt and fell, ultimately losing the race.) They were up by three goals, but then they did a Devon Loch in the last few minutes of the match.