Definition of "peeper" in English

noun

1. (colloquial, chiefly in the plural) The eye.

   • Check out the gorgeous peepers on that guy!
   • 1938, Louis Armstrong (and lyrics by Johnny Mercer), Jeepers Creepers Jeepers creepers, where'd ya get them peepers? Jeepers creepers, where'd ya get those eyes?

2. Someone who peeps; a spy.

3. (dated, slang, derogatory) A private detective.

   • So you go to see this peeper, this Marlowe. That was your mistake.

4. A peeping tom.

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

6. (colloquial) A chicken just breaking the shell; a young bird.