- A candidate or competitor about whom little is known but who unexpectedly wins or succeeds: a Gloucester side that could be a dark horse for the titleMore example sentences
- You certainly hide your bushels under your lights, you dark horses!
- But by no means does Moe view her students as dark horses.
- You should never judge a man by his instrument, because those classical musicians are dark horses.
early 19th century: originally racing slang.
More definitions of dark horseDefinition of dark horse in:
- The US English dictionary