But the rapper Shawn called the police on me

from Beanie Sigel – What You Talkin Bout? (I Ain't Ya Average Cat) Lyrics on Rap Genius

Meaning

This line is sung in the same tone as Jay-Z’s delivery of the chorucs in “Trouble”, in which he says

When the singer rob called the police on me
Ya’ll ni**as ran out and copped the CD

So this is obviously trying to flip Jay’s line back on him

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