Now why can't we fuck with this bitch? (She's boppin')
Wait, tell him why we can’t fuck with this bitch? (That bitch she boppin')

from Tyler The Creator – Boppin' Bitch Lyrics on Rap Genius

Meaning

They cant “fuck with her” as in associate with her because she is not worthy of them.. Because she is a boppin bitch.

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