sleep with one eye open

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sleep with one eye open

To stay awake or sleep very lightly so as to remain very wary, cautious, or alert. I won't forget this insult. You'd better start sleeping with one eye open, because I'll get my revenge.
See also: eye, one, open, sleep

sleep with one eye open

sleep very lightly so as to be aware of what is happening around you.
See also: eye, one, open, sleep
References in classic literature ?
Peggotty gave it as her opinion that she even slept with one eye open; but I could not concur in this idea; for I tried it myself after hearing the suggestion thrown out, and found it couldn't be done.
While examining her eyes, I tried to force a smile by jokingly asking her if she was afraid of her enemies coming after her and that was why she had slept with one eye open. My joke fell flat!
"I always slept with one eye open not knowing what she was up to.
That night I slept with one eye open in the Land Rover.
You would think that finding the source would have put my mind at rest but, just to be sure, I left a couple of lights on, the door ajar and more or less slept with one eye open - not exactly conducive to getting your eight hours (which had already gone out the window when I stayed up until 11.30pm).