lie in
/ˈlaɪ ˌɪn/
noun
- A longer than usual stay in bed in the morning, especially for rest or leisure.
- On Saturdays, I enjoy a lie-in until at least ten o'clock.
- After a long week of work, a lie-in is the best way to recharge.
- The children were promised a lie-in if they finished their homework on Friday night.