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.
(..) Thank you, sweet rabbit. Hmm. Huh? Oh. I would've washed that. The only way I could sneak it off Contraxia was up my... Hey, we're here! I don't think this thing works. Everything seems dark. (..)2018 Avengers: Infinity War