Definition of peeped:
(v) :
(intransitive) To look, especially through a narrow opening, or while trying not to be seen or noticed.
(v) :
To make a soft, shrill noise like a baby bird.
(n) :
A quick look or glimpse, especially a furtive one.
(v) :
(transitive, slang) To take a look at; check out.
(n) :
A feeble utterance or complaint.
(n) :
A short, soft, high-pitched sound, as made by a baby bird.