The energy of a young woman who may or may not secretly want to fuck her brother. She may not even be aware herself that she wants to fuck said brother but her thoughts and words tell a different story. Criticizing every woman her brother might bring around, she finds comfort in trying to convince him that his new gal ain’t the one. She’s a blood related cock block whose motivation stems from a weird desire to fuck her brother.
A girl who fucks brothers especially her friends brothers. Like a motherfucker but instead a brotherfucker. The girl will usually still be in high school or senior school and her friends brother is usually a few years into their university course.
Man. I can't believe she slept with your brother last night. What a brotherfucker.
Strictly, one who engages in a specific type of sibling incest. Usually applied to any contemptible individual or object, regardless of their or its sexual proclivities.