In automotive and mechanical slang, a "bitch" often refers to a notoriously difficult-to-install part (e.g., a "bitch bolt") or a specific, stubborn mechanical issue that has been troublesome to resolve. Likely refers to the model year (2019) or a specific measurement/socket size required for the fix.
Breaking Down the Term
The villagers, who had once viewed Tereza with a mixture of wariness and disdain, began to see her in a new light. They noticed the way Čech would follow Tereza everywhere, tail wagging, and how Tereza's demeanor had softened. She was no longer just the "bitch" of the village; she was a kind and compassionate person, with a deep love for animals. czech+bitch+19+fixed
Cultural References: The term might be used in a cultural or social context that is not immediately apparent. It could refer to a specific artwork, literature, or a colloquial expression. Information on a topic in Czech