Antonyms for the phrase "are wild about" would be "are indifferent to" or "are disinterested in." If someone is not wild about something, it means that they are not enthusiastic or passionate about it. They may feel apathetic or uninterested in the topic. Conversely, if someone is wild about something, it means they are crazy about it and have strong feelings of excitement, joy, or enthusiasm towards it. Using antonyms can help add context and nuance to written or spoken language, allowing for a more accurate and nuanced expression of ideas.