- (context, idiom, politics): A candidate who is nominated unexpectedly, without previously having been discussed or considered as a likely choice.
- (context, rare) An unexpected success.
Etymology: Originally an allusion to an unknown horse winning a race, as used in an 1831 novel s:The Young Duke, The Young Duke by w:Benjamin Disraeli, Benjamin Disraeli.
- Everyone was expecting the red team to win, but the greens were the in the event.
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