I swam down shit's creek and came up clean
With a new lease on life like Andy Dufresne
This is a reference to The Shawshank Redemption, a 1994 American drama film. Tim Robbins' character in the movie, Andy Dufresne, is an inmate in Shawshank Penitentiary, accused of murdering his wife (though he is innocent). At the movie’s climax, Andy crawls through sewage pipes as part of his daring, meticulously planned escape, and comes out leading a better lifestyle than before
Jay says he has been through a lotta shit (crime, homelessness) but came out clean (repented, became spiritual, devoted himself to the rap game).
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