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 periodicals archive ?
She now sleeps with one eye open - her words, not ours
Dave sleeps with one eye open, listening to a police scanner he has in his apartment.
He's the type that sleeps with one eye open,'' said neighbor Phyllis Hostetler.