For me... ''pit bull'' means American Pit Bull Terrier "Am Staff" means American Staffordshire Terrier "Staffy" or "staffy bull" means Staffordshire Bull Terrier. American Bully isn't even part of my vocabulary. I definitley differentiate between the breeds even when using nick names. I think lumping them all together, even nick name wise isn't in the best interest of any of the breeds especially when it comes to bite statistics. Maybe if WE stop lumping them together, everyone else will.