If you ain’t got a knife and fork you’re probably on the menu

from Slaughterhouse – Get Up Lyrics on Rap Genius

Meaning

If you aren’t ready to fight for your rights. Or able to stand up for yourself, in this dog-eat-dog world, you’re going to be eaten by society.

Also note the dialect, you’re now in a literal slaughterhouse.

This is also a metaphor about whack rappers, and all the fans in general. The fans have knifes and forks, as they can already taste the next verse/song/album that Slaughterhouse is serving up. Those who don’t have the knife and fork, are the whack rappers who Slaughterhouse is targeting, they are gonna get devoured.

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