keep (one's) eye(s) peeled (for something or someone)
To remain vigilant or carefully watchful (for something or someone). They should be arriving any minute, so keep your eyes peeled.Keep your eye peeled for a birthday gift we could give your mother.Tell everyone to keep their eyes peeled for the health inspector. We heard she'll be doing a surprise inspection someday soon.
keep one's eyes peeled
(for someone or something) Go to keep one's eyes open (for someone or something).