No waitin', I'll make your block infrared hot: I'm like Satan
Jay will either shoot up your block using his guns with infrared scopes, or supply your block many drugs (making it “hot”)
Satan ties in because it’s real hot in hell
Goes with the previous line which speaks of Jay going into another dealer’s territory/city and setting up shop. “Y'all relatin'” is more of a question to whoever’s territory it was; “can I open up business in your neighborhood?” (to put it nicely). Jay doesn’t ask, he takes over by force.
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