sans-culotte (n.)youdaoicibaDictYouDict[sans-culotte 词源字典]
also sansculotte, "lower-class republican of the French Revolution," 1790, from French, literally "without breeches;" see sans + culottes. Usually explained as referring to the class whose distinctive costume was pantalons (long trousers) as opposed to the upper classes, which wore culottes (knee-breeches), but this is not certain. Related: Sans-culottes; sans-culotterie.[sans-culotte etymology, sans-culotte origin, 英语词源]