The term "freaks out on" refers to getting extremely upset or reacting strongly to something. Therefore, some antonyms for this phrase would be to stay calm, cool, and collected. Other possible antonyms could be to remain composed, unflappable, imperturbable, or unruffled. If someone is able to keep their emotions in check, they may be described as level-headed, pragmatic, relaxed, or even nonchalant. Additionally, antonyms for "freaks out on" may include terms such as undisturbed, unaffected, indifferent, and apathetic. These words all describe a lack of emotional response to a situation or circumstance, as opposed to the strong reaction implied by "freaks out on.