He sounds like Erick Sermon, the generic version

from Eminem (Ft. Strike) – B-Rabbit vs. Lyckety-Splyt Lyrics on Rap Genius

Meaning

Erick Sermon (also known as E-Double) is one-half of the iconic hip-hop duo E.P.M.D.. B-Rabbit’s accusing his opponent of being a bootleg Sermon but lacking the skills that makes E-Dub a legend.

This could also be a joke about the gay rumors that have surrounded Sermon throughout most of his career, as exemplified by him calling the entire crowd “suspect” in the next line.

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