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1. One who achieves unexpected support and success as a political candidate, typically during a party's convention.
2. A little-known, unexpectedly successful entrant, as in a horserace.
1. (Individual Sports, other than specified) a competitor in a race or contest about whom little is known; an unknown
2. a person who reveals little about himself or herself or his or her activities, esp one who has unexpected talents or abilities
3. (Government, Politics & Diplomacy) politics US a candidate who is unexpectedly nominated or elected
1. a competitor that is relatively unknown or that wins unexpectedly.
2. a candidate who is unexpectedly nominated at a political convention.
A candidate or entrant in a race who achieves unexpected support or success; apparently from a well-known Tennessee horse trader who owned a fast black stallion and would ride it like an ordinary horse to fool others into racing against it for money.
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|Noun||1.||dark horse - a political candidate who is not well known but could win unexpectedly|
|2.||dark horse - a racehorse about which little is known|