Sleep in:
① 睡在 ...
② 睡懒觉 √
例句：
On Sundays, I sleep in.
每个星期天，我都会睡懒觉。
Sleepyhead:
瞌睡鬼 √
例句：
Come on sleepyhead - time to get up.
快点吧，懒鬼，该起床了。
Be able to do something in your sleep:
闭着眼睛都能做 √
例句：
It's a piece of cake. I'm able to do this in my sleep.
这对于我来说太简单了，我闭着眼睛都能做。
(素材来自学英语口语，如有侵权请联系删除)
