new shooter n. a horse entering a race, but one that has not been an active participant in the horse-racing circuit, particularly those races which include or lead up to one of the Triple Crown events; a new-comer or long-shot. (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
The expression to turn on a dime means “to change quickly.” Early on the phrase referred to horses or horse-drawn vehicles and later to motorized ones, and suggested the idea of changing direction quickly and easily without needing a large turning...