SNEAK UP (ON SB/STH)


Meaning of SNEAK UP (ON SB/STH) in English

to move towards sb very quietly so that they do not see or hear you until you reach them :

He sneaked up on his sister and shouted 'Boo!'.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.