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
Maddox	['mædəks]
Peggy	PEG-ee	English
Vitus	-	Ancient Roman
Laius	-	Greek Mythology (Latinized)
LetÍCia	le-TEE-zyə (Portuguese), le-CHEE-zyə (Brazilian Portuguese)	Portuguese
Russ	RUS	English