I came with the 30

from Lil B – Cook Steak Knife Lyrics on Rap Genius

Meaning

This is referencing 30mg tablets of narcotic painkillers, such as oxycodone.

That, or he’s got a 30 rack of natty.
Or he has 30 dollars, which isn’t a lot, but it doesn’t have to be since he has so much swag.

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