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 debris! They're in the bear cage! Oh, my God! Oh, my God! Look at this! Take a peek! You can really feel it with a telephoto lens! What's wrong? What's wrong? You people are crazy, do you know that? (..)1996 Twister