The phrase "art antsy" has no directly opposite antonym as it is a colloquialism and not a standard word. However, the word "art" can be antonymous to "science," as they are two different fields of study. The word "ant," which is part of the phrase, can have an antonym in the word "protector" or "ally." As for the word "antsy," some of its antonyms are "relaxed," "calm," and "composed." These words mean the opposite of being restless, and they suggest a sense of tranquility and composure. Therefore, the antonyms for "art antsy" are "science protector" and "composed sci-fi.