gymslip
/ˈdʒɪmˌslɪp/
noun
- A sleeveless dress worn by girls as part of a school uniform, typically over a blouse or shirt.
- Her gymslip was made of sturdy cotton that lasted the whole school year.
- She wore a gray gymslip and white blouse to school every day.
- The old photograph showed rows of girls in matching gymslips.