As a teenager she would 'sneak' out (of her house/apartment) at night to visit her boyfriend.
I'm going to 'sneak' a smoke. [=I'm going to smoke a cigarette while nobody is watching]
She took a 'sneak peek' [=a secret look] at the birthday presents hidden in the closet.
(..) Whee! What is it? We've learnt the importance of telling the truth, right? You've learnt nothing yet. You managed to sneak away from the zoo in a crate of carrots and apples? Not him, me. Why are you wheezing? He went to the pantry with the eggs and sliced carrots for the giraffes. (..)1989 Dva lidi v zoo