Amityville is a small village in Long Island, New York. It is best known for its “haunted” house on 112 Ocean Avenue that led to The Amityville Horror). Basically in the movie a whole lot of demonic shit happened there since the house was built on a tribal burial ground. Eminem is saying his hometown of Detroit is like a real life version of Amityville, because terrifying shit happens there every day.
Note the Amityville story was allegedly based on true events but later proven to be a hoax.
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