have someone's number
US /hæv ˈsʌm.wʌnz ˈnʌm.bər/
UK /hæv ˈsʌm.wʌnz ˈnʌm.bər/

1.
عرف حقيقة شخص, عرف نقاط ضعف شخص
to know someone's true character or intentions, especially their weaknesses or secrets
:
•
I think I have his number; he's all talk and no action.
أعتقد أنني أعرف حقيقته؛ إنه كثير الكلام وقليل الفعل.
•
The detective quickly had the suspect's number and knew he was lying.
سرعان ما عرف المحقق حقيقة المشتبه به وعلم أنه يكذب.