Originally: A shortened name for the American Pit Bull Terrier
Today: A term used by the media to label all bully breeds and any mixes of these breeds. It is also used by backyard breeders who have no other intention than to make money or produce fighting dogs or guard dogs.
'Pit Bull' is the only term commonly used to report these attacks. It is often used many times and the dogs is often not an actual American Pit Bull Terrier.