Songfacts®:

• Eminem recorded this for the 2018 Marvel movie Venom, which follows the story Eddie Brock, who becomes host to an alien symbiote. The parasite bonds with Brock, giving him superpowers as long as they share the same body. The song was also included as a bonus track on Em's Kamikaze Album.
• Most of the song is about Eminem himself, rather than the comic book character.
  
  Venom, (I got that) adrenaline momentum
  Venom, not knowin' when I'm
  Ever gonna slow up in 'em
  Ready to snap any moment
  
  However in the third verse, Em compares the idea of Eddie Brock getting possessed and becoming Venom to his dual identity of Marshall Mathers becoming Eminem the rapper. He likens the brutal flesh-eating Venom, to Eminem who has been affecting young people since he first rose to fame.
  
  I said, "Knock knock, let the devil in, alien"
  E-E-Elliot phone home,
  Ain't no telling when this choke hold
  On this game will end, I'm loco
  Became a symbiote, so
  My fangs are in your throat, ho
  You're steppin' in with my
  Venom