Well, if it's good enough to get broke off a proper chunk
I'll take a small piece of some of that funky stuff

from Dr. Dre (Ft. Snoop Dogg) – Nuthin' But A G Thang Lyrics on Rap Genius

To “break off” is to make love to a girl; here, Snoop extends the metaphor to literal loaves that get a chunk broken off of them (brownies, bricks of cocaine, densely dried weed…)

In either case — if it’s decent quality — Snoop would like a small portion

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