The phrase "am cahoots" is an idiomatic expression that means to be in collusion or conspiracy with someone. Its antonym would be "not in cahoots," which implies the absence of any secret agreement or cooperation between two or more parties. Another antonym of "am cahoots" could be "being honest," which means being sincere and truthful in one's dealings with others. Similarly, "transparent" could serve as an antonym because it implies openness and clarity, thus indicating that there is no hidden agenda or secret dealings in place. In short, the antonyms of "am cahoots" signify integrity, openness, and honesty.