I heard this line in the rap song Ghetto Bird by Ice Cube (full lyrics here) and I'm completely puzzled by its meaning.
My homey's here to lick on a trick for a Rolex
And let me try the four next
Now the four I was driving was hotter than July
looked up and didn't see it whippin' in the sky
Saw a chopper with numbers on the bottom
"Calling all cars, I think we've got em."
I could come up with several combinations of these meanings that would make sense on their own, but none of such combinations makes sense together with the following lines. Could somebody enlighten me what this line really means?