IdiomAnimalsEnglish

dark horse

Meaning: A competitor who is little-known by most people but who is expected to win by someone more knowledgeable.

Example: “Nobody expected the quiet newcomer to win; she was the dark horse of the competition.”

Equivalents in other languages

Origin: From horse racing, where a "dark" horse was one whose form nobody knew. Benjamin Disraeli's novel The Young Duke (1831) describes a race won by "a dark horse which had never been thought of." In American politics it soon meant a surprise candidate; James K. Polk, nominated for president in 1844, is often called the first.

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