peeper

/P IY1 P ER0/
noun
  1. 1

    (chiefly in the plural) The eye.

    โ€œCheck out the gorgeous peepers on that guy!โ€

  2. 2

    Someone who peeps; a spy.

  3. 3

    A private detective.

  4. 4

    A peeping tom.

  5. 5

    An animal, such as some frogs, having a shrill, high-pitched call.

  6. 6

    A chicken just breaking the shell; a young bird.

Source: https://en.wiktionary.org/wiki/peeper