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
Antono	ahn-TO-no	Esperanto
Feidhlim	FE-lim	Irish
Nabu	-	Near Eastern Mythology
Damon	['deimən]
Jayadev	-	Indian, Kannada
Roshanak	-	Persian, Ancient Persian