dark horse
Meaning
A little-known person or team who unexpectedly succeeds or is likely to win.
Origin
From 19th‑century horse racing: a "dark" (unknown) horse whose abilities weren’t well known could surprise bettors by winning. Popularized in English by Benjamin Disraeli’s 1831 novel "The Young Duke."
Notes
Implies an under-the-radar contender with surprising potential or success. Common in sports, elections, business; used as a noun phrase (a/the dark horse).
Examples
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No one expected Maya to win the election, but she turned out to be the dark horse of the race.
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The small startup is a dark horse in the industry, quietly building a better product than the big players.
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He’s a dark horse candidate, but his ideas are gaining traction with voters.
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I wouldn’t underestimate that team—they’re the dark horse that could upset the favorites.
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She was the dark horse in the competition, surprising everyone with her final performance.
Grammar & Usage Notes
Typically used as a noun phrase: "a dark horse" (one), "the dark horse" (specific). Often with "in" or "of" ("a dark horse in the race"). Plural: "dark horses."
Synonyms
- underdog
- sleeper
- wild card
- long shot
Antonyms
- sure thing
- front-runner
- favorite