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.
(..) Uh, which way, which way? OK, where? That way! That way! This is it, I think. Uh! Oooh! Uh! - Lemme sneak a peek. - OK. Uh! Huh. - This is it. - Oh. C'mon. (..)2006 Tenacious D in the Pick of Destiny