I know hip-hop's alive and well
If it died, you other crews wouldn't survive the smell

from Eminem (Ft. Slaughterhouse & Yelawolf) – BET Shady 2.0 Cypher Lyrics on Rap Genius

Meaning

Hip hop is alive and going strong. So strong that if it died, weak rappers wouldn’t be able to handle the powerful stench of it. In using the word “crews,” Budden could be taking a shot at any of the other major groups in hip hop today (MMG, YMCMB, G.O.O.D. MUSIC, etc.) In this, he’s saying these other crews are not hip hop, thus would have to bear the stench of the rotting corpse.

This is also fitting with the group name since slaughterhouses are known to smell foul.

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