Art mad refers to being extremely passionate about art. However, there are several antonyms for this word. One opposite of art mad is apathetic, which means showing no interest or enthusiasm towards art. Another antonym is indifferent, meaning having no particular feeling or interest towards art. Similarly, disinterested means having no concern or interest in art. Lastly, indifferent could be another antonym for art mad, which means having no preference or bias towards art or anything else. These antonyms represent the lack of interest or passion towards art, in contrast to the strong interest in art that art mad suggests.