dyed-in-the-wool
Pronunciation:
/ˌdaɪd ɪn ðə ˈwʊl//ˌdaɪd ɪn ðə ˈwʊl/adjective
Definitions
(of textiles) Dyed before being formed into cloth.
Firmly established in a person's beliefs or habits; deeply ingrained in the nature of a person or thing.
Example: John Major was described by his opponents as a dyed-in-the-wool Conservative.