Cause I'm as ill as a convict who kills for phone time
There are only so many phones in prison, so if somebody’s hogging up the phone line and you want to make a call, sometimes you just have to shank the guy to get him out of your way.
Alternate interpretation: You get that one call after you commit a crime; it’s pretty gangster to take a murder rap just so you can make a phone call
Notice that Nas subtly claims to be as ill as his buddy in prison.
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