(idiomatic) A surprise advantage of which others are not aware.

Any dog, such as a husky, that pulls a sled as part of a team.

The act of walking while not conscious or aware of it, during one's sleep.

present participle of sleepwalk

A pattern of sleeping and waking; especially a regular pattern of sleeping and waking designed to promote health

The condition of being kept awake and not getting enough sleep (perhaps forcibly by someone else, or by a sleep disorder), to the point of noticeably lower alertness.

Covered in sleet; full of sleet.

plural of sleeping pill

The property of being sleazy.

In a sleepy manner.