Knock knock I'm at your neighbor house
Straight cash I bought ya neighbor out
That image was taken from a white supremacist website: there goes the neighborhood. A fear of white racists everywhere is of blacks (or any other ethnic group) moving into their neighborhood and taking over.
Jay-Z is saying he’s knocking at your door and buying your neighbor’s house for cash. That suggests that even if people in high society don’t want Jay around they cannot lock him out of their environment. Money talks and someone will always be willing to deal, hence “I bought ya neighbor out.”
The “knock knock” is also a mockery suggesting the joke is on those who have been closing financial doors on black people, Jay says guess what I made it through all the odds and I put your neighbor out.
As he would say:
In the song “My Way,” which he mentions below, he talks about his grandma not being able to believe why “high society” wouldn’t want him as their neighbour.
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