HAVE (GOT) SB'S NUMBER


Meaning of HAVE (GOT) SB'S NUMBER in English

( informal ) to know what sb is really like and what they plan to do :

He thinks he can fool me but I've got his number.

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