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.
(..) - Hank. Do you think I might get to go inside? See the actual lab? Yeah. Yeah, I'll tell you what, we're gonna go peek our heads in... ...check it out first. Stay here a minute. Let's go, Frank. Oh, God. Oh, God. Oh, my God. (..)2008 TvShow: Breaking Bad Title: Pilot Season: 1 Episode 1