peeper

noun

1. (colloquial, in-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?”

   “The witness stand. Goldminers giving evidence, sure he's violent didn't I see him with my own peepers chasing those poor kids up on the roof.”

2. Someone who peeps; a spy.

   “Who's there? peepers, intelligencers, eavesdroppers?”

   “If listeners seldom hear good of themselves, it is also true that peepers sometimes see more than they like; and Betty, the cook, as she reached the landing, glancing askance with ominous curiosity, beheld a spectacle, the sight of which nearly bereft her of her senses.”

3. (dated, derogatory, slang)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.