I don't wanna be, be in your posse girl
You're a trip and I don't flip on your ecstasy
I don't wanna be, be in your posse girl
Trust me, you'll see, (We're yin and yang) that's not prophecy

from Kimbra – Posse Lyrics on Rap Genius

Meaning

Not uncommon in most popular girl posses, they’re into drugs like ecstasy.

Kimbra pledges to be completely sober.

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