dander /ˈdændə(ɹ)/noun 5verb 2forms 3phrases 1 noun5 •(slang) Passion, temper, anger. Usually preceded by "have" or "get" and followed by "up".He'll get his dander up if his team is criticized.She has her dander up every day about discrimination against women. •Dandruff—scaly white dead skin flakes from the human scalp. •Hair follicles and dead skin shed from mammals. •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. •(Scotland) A cinder; (in the plural) the refuse of a furnace verb2 •To wander about. •To maunder, to talk incoherently. formsdandered · dandering · danders Phrases with dander get someone's dander upTo anger or annoy someone.