"Wert nuts about" can be defined as being extremely enthusiastic or passionate about something or someone. To describe the opposite of this term, one could use antonyms such as indifferent, uninterested, dispassionate, apathetic, or detached. These words convey a lack of enthusiasm or interest in a particular subject matter, showing that the person is not highly invested or emotionally attached to it. Other antonyms for "wert nuts about" could be passive, unconcerned, uninvolved, or impartial. Overall, these antonyms describe a state of not being highly affected or influenced by something, resulting in a lack of fervor or excitement.