Definitions

1. noun

a person who sleeps late or is habitually lazy, especially in the morning

“She woke up late and was called a sleepyhead by her annoyed roommate.”

2. noun

a person who is sleepy or lethargic, often to an excessive degree

“After the late-night party, John was a complete sleepyhead and couldn’t wake up for work.”

3. adjective

sleepy or lethargic, especially in the morning

“As a sleepyhead, she found it hard to get out of bed on a cold winter morning.”