F.A.N.B.
F. A. N. B. means you're ready to throw down with any bitch who dares to mess with your man.
My homie said 'F. A. N. B.' when he saw his girl with my cousin.
She texted me 'F. A. N. B.?' when I showed up at her party.
He posted 'F. A. N. B.' on Instagram when his ex came back.