Her slip 'peeked out' from beneath her skirt. [=a small part of her slip could be seen beneath her skirt]
We saw a 'sneak peek' [=a brief showing] of the movie that will be released next month.
They tried to 'sneak a peek' at the actors getting ready behind the curtain.
(..) We have explored the possibility, of digging tunnels, of sending hot air balloons, of rerouting supply C-s to take a peek, but that might be too alerting. We've looked for ways of collecting available DNA from his trash, you know, looking for his toothbrush, but they burn the trash. (..)2012 Zero Dark Thirty