hall pass

• 允许学生在上课期间离开教室的通行证；也常作比喻，指破例获准做某事或暂时免除常规约束的许可。

A permission slip or pass that allows a student to leave the classroom during school hours, often used metaphorically to describe permission to do something outside of normal rules or boundaries.

1. School permission slipA2informalamerican

   A written or printed permission allowing a student to leave the classroom during school hours, typically to go to the restroom, library, or office.

   课堂出入证

   • The teacher gave him a hall pass to go to the nurse.
   • She forgot her hall pass and got detention.
   • Students must carry a hall pass when leaving class.

2. Metaphorical permissionB2slangamerican

   An informal or humorous term for permission to do something, especially something that might otherwise be restricted.

   特许通行证

   • He considered the weekend a hall pass to eat junk food.
   • She gave herself a hall pass to skip the gym today.
   • The promotion felt like a hall pass to take a vacation.