1
general::
Phrase(s): peep out (of something) (at someone or something)
to sneak a glimpse of someone or something out of something, as through a hole. • A little mouse peeped out of its hole at the bright lights in the room. • Johnny, hiding in the closet, peeped out at the guests through the partly opened door.
McGrawhill's American Idioms And Phrasal Verbs