1.
sleepyhead; late riser; slugabed
A person who oversleeps or has difficulty waking up. Used affectionately or teasingly, especially toward children or close friends.
My little brother is a sleepyhead and gets woken up by our mother every morning.
Compound of 寝坊 (oversleeping) + すけ (a suffix used to characterize a person, often with a playful or teasing tone). The すけ suffix appears in other character-describing words like 甘えんぼうすけ.
Common collocations
Register
Mostly informal and affectionate. Commonly used by parents addressing children or among close friends. Not used in formal or business contexts.