By thoroughbred is meant a horse or mare whose pedigree is registered in the StudBook kept by Messrs Weatherby, the official agents of the Jockey Club - originally termed the keepers of the match-bookas well as publishers of the Racing Calendar.
You will get better results if you include additional information on the ancestor, such as "Nimrod Weatherby" and "Davidson County."
Santa Claus is Freaking Me Out by Lord Weatherby.
Lord Weatherby, I suspect you're not alone.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.