I doubt this is the case but I always kinda thought of it being a reference to changing the pitch of a sample (Change my pitch up) and then having it sound more female, therfore (Smack my bitch up).
I doubt this is the case but I always kinda thought of it being a reference to changing the pitch of a sample (Change my pitch up) and then having it sound more female, therfore (Smack my bitch up).