Sleep-drunk refers to a feeling of grogginess or disorientation that one experiences after waking up from a deep sleep. Some synonyms for this term include groggy, sluggish, drowsy, and heavy-eyed. These words are often used to describe someone who has difficulty focusing or thinking clearly in the morning. Other synonyms for sleep-drunk are foggy, lethargic, sleepy, and listless. These terms can be used interchangeably to describe a person who is struggling to wake up or maintain alertness after a long night's sleep. Overall, sleep-drunk is a common feeling that many people experience, and there are many ways to describe it using synonyms.