Bitches mad at you, ‘cause they can’t have you
Press want to know about the daughter of Matthew

from Jay Z – If I Can't (Freestyle) Lyrics on Rap Genius

Meaning

Hov was referencing the rumors surrounding his then-unconfirmed romance with singer Beyonce Knowles, who is now his wife. B’s father (and former manager — ouch!) is Matthew Knowles

The bitch who is mad at him was likely singer Blu Cantrell, who very publicly made a play for Hov around this time

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