The phrase "downs on" does not have a specific antonym since it is not considered a commonly used phrase. However, the word "downs" itself has several antonyms, such as "ups," "ascents," or "ascensions." The word "on" also has numerous antonyms, including "off," "free," or "unattached." Therefore, if one were to consider "downs on" as an expression of negative criticism or disapproval, some possible antonyms could be "supportive," "praising," or "approving." In summary, while "downs on" does not have a direct antonym, its individual components have multiple opposing terms that can be used to convey a different sentiment.