Everybody knows I'm a motherfucking monster
You can love him or hate him, but either way you gotta recognize Jay-Z as a lyrical beast; a monster in hip hop.
This may also be an answer to the above question. Everybody may refer to the Sasquatch, Godzilla, King Kong, etc. They, while monsters in their own right, recognize Jay-Z to be a real monster.
To help improve the meaning of these lyrics, visit “Monster” by Kanye West (Ft. Bon Iver, Jay Z, Nicki Minaj & Rick Ross) Lyrics and leave a comment on the lyrics box