I never knew what it was either until we got Brodi but I believe his breeder called it the occiput? (sp?) we never really seen chloe's smart bump but Brodi's we do.
A boney section of the skull located at the back of the topskull. Also known as an Occipital Protuberance. This bone, during puberty, or if not situated properly in an adult, creates an unattractive bump (or protuberance) in the shape of the headpiece. Situated properly, it creates a slight dome to the skull.