From https://refinery29.com/2017/01/135407/migos-bad-boujee-meaning linked in the comments:

Now that we have that out of the way, “Boujee” is a bit more complex. Also stylized as bougie, the word is derived from “bourgeois,” an elite demographic defined by a need for luxury and material items. Bougie is true to that definition in a lot of ways. Black bougie folks often pride themselves on going to the best schools and only engaging in activities associated with affluence and elegance. In the most simplistic terms, bougie is the material opposite of “ghetto.”