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Related to peeper: pixel peeper
slang Someone who is particularly or overly critical of or sensitive to the resolution, clarity, and quality of digital images or photographs. When I started getting into digital photography, I'll admit that I became quite a pixel peeper for a while. Later on though, I became less obsessive over technical quality and learned to appreciate well-composed photographs in their own right.
One's eye. (That is, what one uses to peep.) Typically used in the plural and often used to refer to the eyes of children. Your baby girl has such beautiful peepers! It was a little intimidating walking into a room full of students and seeing all their peepers staring expectantly at me.
n. the eyes. Come on, use your peepers. Take a good look.
See also: peeper