brotherfucker noun3 •(vulgar) One who engages in incestuous sex with their brother.1963, Robert E. L. Masters, Patterns of Incest, p 269 — 1963 •(vulgar) Motherfucker (generic term of abuse).This hurts like a brotherfucker! •(vulgar) A homosexual man.Here in N tank was a pretty slim boy lover, the little brotherfucker telling tender tales of lusty sucking twelve-year boys, pants down on the sofa, […] — 1973 formsbrotherfuckers
