dander

Etymology 1

From a shortening of dandruff.

noun

1. Dandruff—scaly white dead skin flakes from the human scalp.
2. Hair follicles and dead skin shed from mammals.
3. 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.

Etymology 2

Uncertain.

noun

1. (chiefly Scotland) A cinder; (in the plural) the refuse of a furnace
2. (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.

Etymology 3

Alteration of dandle or daddle

verb

1. To wander about.
2. To maunder, to talk incoherently.