thor ‧ ough ‧ bred /ˈθʌrəbred $ ˈθʌroʊ-, ˈθʌrə-/ BrE AmE noun [countable]
1 . a horse that has parents of the same very good breed:
a thoroughbred stallion
2 . especially British English someone who seems to do something naturally to a very high standard:
football thoroughbred Mick Jones
—thoroughbred adjective