noun Dandruff—scaly white dead skin flakes from the human scalp.
noun Hair follicles and dead skin shed from mammals.
noun Allergen particles that accumulate on and may be shed from the skin and fur of domestic animals, especially from household pets such as cats and dogs.
noun A cinder; the refuse of a furnace
noun Passion, temper, anger. Usually preceded by "have" or "get" and followed by "up".
He'll get his dander up if his team is criticized.