Noun
A chicken just breaking the shell; a young bird.
One who peeps; a prying person; a spy.
The eye; as, to close the peepers.
Source: Webster's dictionaryAs for the peeper - its my favorite frog! Source: Internet
In case you didn't know 'leaf peeper' is the name given to those who visit New England in the fall to admire the beautiful colours of the leaves as autumn comes to an end. Source: Internet