A misheard lyric from T.I's "Live Your Life feat. Rihanna" where Rihanna states that she is a paper chaser but was thought to be her calling herself a Big Buchesa.
A Big Buchesa is defined as a powerful iconic woman who chases for her own money while also being a big fuckin slut, respectfully.
"I don't need a man or his money, I'm on my Big Buchesa shit."
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"Who brought her? I love her energy, she looks powerful."
"Idk, but thats a Big Buchesa."