The word "sans-culottic" originated from the French Revolution and refers to the dress and behavior of the working-class people who wore trousers instead of the knee-length breeches that were popular among the aristocracy. Some synonyms for "sans-culottic" would include proletarian, worker-class, plebeian, or commoner. These words all describe individuals who are of lower social status and are typically associated with manual labor. Other possible synonyms could be informal, casual, or relaxed, as "sans-culottic" implies a lack of emphasis on formal dress and behavior. Overall, there are many words that could be used as synonyms for "sans-culottic" depending on the context in which it is being used.