Smartened up, often used to describe someone who has become more fashionable or stylish, has several antonyms that convey the opposite meaning. A person who has not smartened up might be described as shabby, unkempt, or slovenly, suggesting a disheveled appearance or lack of care in one's grooming or attire. Conversely, a person who has smartened up may be said to have become refined, polished, or sophisticated. Those who have not smartened up may also be described as uncultured, unsophisticated, or unworldly, suggesting a lack of exposure to the finer things in life or an absence of refinement in their taste or behavior. Other antonyms for smartened up include "dumbed down," "let go," and "let oneself go.