A very sticky growth of fat cells aka lipoma!
Lipomas are slow-growing, benign (non-cancerous) growths of fat cells. These cells are contained in a thin capsule that creates the appearance of a “bump” right under the skin. Lipomas are typically not tender, move around easily, and don’t require treatment. However, some lipomas may sit in places that cause discomfort to the patient, which is why some people may request removal. Appearance is another reason people may request removal as well. Often a small incision can be made over the lipoma and they can be "popped" out easily, which is a simple in-office surgical procedure under local anesthesia.