keep your eyes peeled/skinned

keep your eyes peeled/skinned

Be particularly watchful; remain alert. This American expression dates from the mid-nineteenth century and presumably likens peeled or skinned to being wide open. An early reference in print occurs in J. S. Robb’s Squatter Life (1847): “Keep your eye skinned for Injuns.”
See also: eye, keep, peel, skinned
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