I drink poison
Then I vomit diamonds

from Nas (Ft. Damian Marley & K'naan) – Tribes At War Lyrics on Rap Genius

Meaning

Poision = Colonialism, Corporatism.

A allusion to the African situation. As diamonds can mean African heroes (who result by fighting the “poison”). It’s also a reference to the diamond mining industry in Africa in countries such as Ivory Coast, where the business is pretty shady and violent.

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