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.
(..) but l hate this hill! I do beIieve I'm beginning to feeI that corn dog. Uhh! Eh! Ah! Maybe you can just sneak gentIy through? -OK, I'II try. -Good. CLARlSSE/ Right. Now, blaze on up. MlA/ l--l got it! (..)2001 The Princess Diaries