Dark Horse

A dark horse is a little-known person or thing that emerges to prominence, especially in a competition of some sort or a contestant that seems unlikely to succeed.

Read more about Dark Horse:  Origin, In The Political Arena, Use in Music and Film, Use in Publishing

Famous quotes containing the words dark and/or horse:

    “These are not dark days: these are great days—the greatest days our country has ever lived.”
    —Winston Churchill (1874–1965)

    “The steed bit his master;
    How came this to pass?
    He heard the good pastor
    Cry, ‘All flesh is grass.’”
    —Unknown. On a Clergyman’s Horse Biting Him (l. 1–4)