Most people that use the term "dog ears" are referring to the excess fat and skin under the arms that can be left behind after a mastectomy if no contouring work is performed, particularly with larger breasts. This can be unsightly and uncomfortable. You may hear surgeons use the term another way, to refer to a standing cone deformity, or a "peak" of skin at the end of an incision that stands up instead of lying flat. Learn more here.