be dead to the world

To be sleeping very soundly. Don't worry, the vacuum won't wake him—he's dead to the world.

to be sleeping very deeply Guy was curled up on the sofa, dead to the world.

Name	Pronounced	Usage
Lorelei	lawr-e-LIE, LAWR-e-lie	Germanic Mythology
Traian	-	Romanian
Leonhard	LE-awn-hahrt	German
Haig	-	Armenian
Downey	['dauni:]
Baldassare	-	Italian