'dark horse' definitions:
Definition of 'dark horse'
From: WordNet
noun
A political candidate who is not well known but could win unexpectedly
noun
A racehorse about which little is known
Synonyms of 'dark horse'
From: Moby Thesaurus
- also-ran,
- aspirant,
- baby kisser,
- bare possibility,
- candidate,
- defeated candidate,
- dud,
- enigma,
- favorite son,
- fighting chance,
- frontier,
- frontiers of knowledge,
- gambling chance,
- hardly a chance,
- hopeful,
- hundred-to-one shot,
- improbability,
- lame duck,
- little chance,
- little opportunity,
- long odds,
- long shot,
- matter of ignorance,
- mystery,
- n,
- off chance,
- office seeker,
- outside chance,
- political hopeful,
- poor bet,
- poor lookout,
- poor possibility,
- poor prospect,
- presidential timber,
- puzzle,
- remote possibility,
- riddle,
- running mate,
- sealed book,
- slim chance,
- small chance,
- stalking-horse,
- terra incognita,
- the incalculable,
- the strange,
- the unfamiliar,
- the unknowable,
- the unknown,
- unexplored ground,
- unexplored territory,
- unknown quantity,
- unlikelihood,
- x,
- z