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:
“Vader was seduced by the dark side of the Force.”
—George Lucas (b. 1944)
“Later you hear it wander the dark house
Like a mother who rises at night to seek a childhood picture;
Or it goes to the backyard and stands like an old horse cold in the
pasture.”
—Robert Penn Warren (1905–1989)