The antonyms for the phrase "a wrap" can vary depending on the context in which it is used. For example, if it is used in the sense of completion or conclusion, the antonyms might be 'incomplete,' 'unfinished,' or 'ongoing.' In the sense of a food item, antonyms could include 'unwrapped,' 'open,' or 'unprepared.' If used as slang for a type of clothing, antonyms might be 'exposed,' 'bare,' or 'unclothed.' Overall, it is important to understand the context and usage of the phrase in order to determine the most appropriate antonyms.