The phrase "what is into" refers to someone's interests or passions. Some antonyms for this phrase include disinterested, unengaged, and apathetic. If someone is disinterested in something, they lack enthusiasm or interest in the topic. Similarly, if someone is unengaged, they are not actively involved or invested in the activity. Apathetic suggests a lack of emotion or concern, indicating that someone is indifferent to the subject matter. Ultimately, while "what is into" suggests excitement and engagement, these antonyms point towards a lack of interest, investment, or emotional connection.