The guy was talking about
bitchslapping a guy instead of hitting with a closed fist, saying
the other guy was a bitch. Well, when he wanted to hit with closed fists, that was always an option, so was slapping each other around like bitches, and calling it a bitchslap, or
anything else. It really all depended on how much more badass than the other guy he felt, if he felt like fighting in the first place.