Bedeutung von “creep up on sb” — Learner’s Dictionary

creep up on sb

phrasal verb with creep us uk /kriːp/ verb past tense and past participle crept

to surprise someone by moving closer to them from behind:

Don't creep up on me like that!

If a feeling or state creeps up on you, it happens gradually so that you do not notice it:

Old age just creeps up on you.

(Definition von “creep up on sb” aus dem Cambridge Learner's Dictionary © Cambridge University Press)