A cocksure statement/threat meant to signify your inevitable domination over another. Generally used as a shorter way to say "Bitch, I'm going to fuck you up."
The generic animesamurai, having transformed into a godlike swordsman, withdrew his sword and said with the utmost calmness to his opponent: "Bitchfuck."
A word describing an unintelligent person, insulting a person to the level of a whore. It's most commonly used aggressively by a drunkin' mother, who would then use this in frustration as a result of her offspring being careless and/or confused in daily routine or thought.