Examples:

• Bit of a dark horse yourself.
• The director of his office staff is a dark horse for the media.
• You can check the pictures and read the sypnosis for each comics in the Tomb Raider comics Vol.3 by Dark Horse.
• The popular Dark Horse Comics character is making his way to The Clone Wars this season, and this is one of no less than 3 different figures planned for the character!
• This is the year of the dark horse.
• There's kind of a dark horse in the running.
• Dark horse, isn't he, your dad?
• Gladys, aren't you the dark horse.
• So, I booked myself a flight to Boston in '95, 19 years old and definitely the dark horse candidate at this race.
• A dark horse emerged from the convention as the party's nominee for president.