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sleeping late in the morning; sleeping in; lie-in; oversleeping
late riser; person who is bad at getting up in the morning
朝寝坊した日の午後は忙しい。
The afternoon of a day I sleep in is busy.
朝寝坊して電車に乗り遅れてしまう。
I overslept and missed the train.
朝寝坊しないように早く寝ました。
I went to bed early to avoid oversleeping.