The term "off cuff" refers to something that is said or done spontaneously or without preparation. Some antonyms for this phrase include "planned," "rehearsed," or "premeditated." These words suggest that an action or statement has been carefully thought out and prepared in advance, rather than being impulsive or spontaneous. Other antonyms might include "deliberate," "calculated," or "careful." These words highlight the idea that an action or statement has been made with intention and forethought, rather than being a casual or spur-of-the-moment decision. Whether something is done "off cuff" or is carefully planned and considered can have a huge impact on the outcome.