Antonyms for "most well dressed" would be words that suggest a lack of style or fashion sense. Some possible options may include "shabbily dressed," "unfashionable," "unkempt," "disheveled," "scruffy," or "rumpled." These terms may suggest that the individual is not concerned with their appearance, or that they have not put in the effort to cultivate a stylish look. Other antonyms could include terms that suggest a particular aesthetic or style that is the opposite of being well-dressed, such as "grunge," "bohemian," or "punk." Overall, antonyms for "most well dressed" would be words that suggest a lack of style or attention to appearance.