mob cap
noun
- a large soft hat covering all of the hair and typically having a decorative frill, worn indoors by women in the 18th and early 19th centuries室内女软帽（盖住所有头发, 常有饰边, 用于18-19世纪早期）。
词源
mid 18th cent.: mob, variant of obsolete mab 'slut'. The word mob was first used in the sense 'prostitute' （mid to late 17th cent.）, later denoting a négligé （mid 17th cent. to mid 18th cent.）.