fall asleep *
dope off
flake out
drift off
nod off
drop off
doze off
drowse off

They would start coming in late and drifting off early.

When he left they just drifted off into the bush.

Over the course of the next few weeks the staff began to drift off to other things.

I see them from here,' turned his head away and drifted off again.

I was just drifting off when mother's voice came to me.

The sun was coming up before I finally drifted off.

His voice drifted off and he went back to whatever place he'd been in.

People began to talk among themselves, others to drift off.

My hand on his back, I drifted off to sleep.

But being able to make nothing of them he finally drifted off to sleep.