The phrase "doctored up" typically means that someone has altered or improved something, but antonyms for this phrase might include words like unimproved, unchanged, unaltered, unmodified, or natural. These words suggest that something has been left alone or has not been enhanced in any significant way. Other antonyms might include phrases like "left as is," "untouched," "unedited," or "unfixed," all of which indicate that no attempts have been made to modify or improve something. In essence, antonyms for "doctored up" imply a lack of interference or alteration, often suggesting that something is presented in its most authentic or raw form.