I had enough of the broken promises
So I'm in a room full of Pocahontases

from 2 Chainz (Ft. Lil Wayne) – Yuck! Lyrics on Rap Genius

Meaning

There have of course been countless broken promises to Native Americans over the centuries. One of the biggest was the Treaty of Fort Laramie

The Ponca tribe had a lot of treaties with the United States Government that were never honoured…just like 2 Chainz had with DTP which he ended up breaking away from. Pocahontases are Beautiful Native American Girls fro the Ponca tribe with Long Dark Hair, Beautiful Eyes and Gorgeous Skin — Near Perfection.
He’s referring to his love for bitches and also making a clever relation on what makes the Pocahontases and himself more or less alike — the broken promises.
Oh…and here’s what a Pocahontas looks like:

To get an idea of how beautiful they are, you might also remember this Disney Classic:

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