What's the best way to see what kind of a person your boss is? Just sneak up behind him and take a peek at his screen! Ah, the lazy bastard's browsing Facebook again while he's working us to the bone!
to peek (through a keyhole, gap, etc.); to look down into (a ravine, etc.); to peek into (a shop, bookstore, etc.); to sneak a look at; to take a quick look at; to peep (through a telescope, microscope, etc.); to stick out (a scarf from a collar, etc.)