I killed the Otis beat by myself, I didn't need no help

from Papoose – Shot Caller Lyrics on Rap Genius

Meaning

This song is the 3rd track off his 2011 mixtape King Of New York and the 2nd track is his remix of Jay-Z and Kanye West song Otis.
He’s saying he did his thing on the last track very good and didn’t need any ghostwriter to finish it.
http://www.youtube.com/watch?v=w4tzI7yuY64

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