It's nothin', roll up the stuffin'
Put it in the oven, get baked like muffins

from B.o.B – No Future Lyrics on Rap Genius

Nice metaphor here: Stuffing is weed, the oven is a pipe or a joint, and getting baked is, well, getting baked.

This could also be a reference to cooking with weed. B.o.B is making pot muffins (though pot brownies are much more conventional).

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