brotherfucker 

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.

brotherfucker by Herb Mo May 28, 2008

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.

Often shortened to brother, brofo, or bro.

See also sisterfister.

Hey, brother, can you spare a dime?
My mobo is a brofo.
Leave off my bro, man.

brotherfucker by Lucifer B September 14, 2005

brotherfucker 

when a man gets accused of wanting a threesome with a female and her brother and then furthermore is accused of just wanting her brother

girl: so ur a huge cock tease....and u wanna fuck a guy.....
annnd you told my brother you would visit him without me
you are so fucked in the head to do this to me.

man: no i am not a brotherfucker

brotherfucker by stephensharp July 14, 2009

brotherfucker 

The nickname for the anti Semitic US rep named illhan omar who illegally married her brother.

Illhan Omar is such an anti Semitic shitstain that she picked up the nickname as the brotherfucker when it was revealed that she married her brother.

brotherfucker by bendover91 February 11, 2021

Brotherfucker

A freemason/jesuit

Person 1: “Are you a traveling man?”
Person 2: “Hello brother:)”
Person 1: You fell for it, brotherfucker

Brotherfucker by Zoghater69420 November 23, 2025

brother fucker 

a girl who has sex with her boyfriend's brother.

she quickly became known as the brother fucker because she had sex with her boyfriend's brother while her boyfriend was in Iraq.

brother fucker by faithfully yours June 11, 2009

Brother Fucker 

a friend who hooks up with your brother

my bestie Bailey is a brother fucker and I actually don't mind it!

Brother Fucker by Mad Dog Unleashed March 16, 2023