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.
(..) Headshots. All. Snap! Right in the medulla. I thought you girls were above all that. Come here. Take a peek in. Seeds! These are from home. Heirlooms. The real thing! I plant one every chance I get. Where? (..)2015 Mad Max: Fury Road