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Sleep with one eye open

verb

Definitions

1.verbTo remain vigilant at all times, especially by remaining partially awake or sleeping only lightly so as to avoid being caught off guard.

Synonyms

keep an eye open keep one's guard up keep one's eyes peeled keep one's eyeballs peeled keep one's head on a swivel keep one's eyes skinned keep a lookout look out watch one's back keep an eye peeled keep an eye out keep one's ears open

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