Police cars with they sirens come by when I'm rhyming
Saying they got a call that somebody 'round here done fired shots

from Royce Da 5'9" (Ft. Busta Rhymes) – Dinner Time Lyrics on Rap Genius

Meaning

Royce is saying that his rhymes are like gun shots.
http://www.youtube.com/watch?v=Qk5X2K6CZNo

Since his rhymes are like gun shots, someone had to call to police who then went to Royce’s

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