A WONK is a person who is an expert in a particular field, especially politics and policy. They are often seen as having an obsessive interest in the details of their chosen field, and are usually highly knowledgeable about the subject. A political policy expert is someone who has a deep understanding of the policies and laws that govern a particular political system. They are typically well-versed in the history and current trends of the political landscape, and are able to provide insight into how different policies may affect the public.