Definition of sleepyhead noun from the Oxford Advanced Learner's Dictionary

 

sleepyhead

 noun
noun
BrE BrE//ˈsliːpihed//
 
; NAmE NAmE//ˈsliːpihed//
 
(informal)
 
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a way of addressing somebody who is not completely awake Come on sleepyhead—time to get up.
See the Oxford Advanced American Dictionary entry: sleepyhead