Dandruff

(n.) A scurf which forms on the head, and comes off in small or particles.

Thesaurus Entries

carrion, chip, corruption, decay, excrement, filth, flake, floccule, flocculus, flock, foul matter, furfur, gangrene, mess, muck, mucus, obscenity, ordure, paring, pus, putrid matter, rot, scale, scurf, scuz, shaving, slime, smut, snot, sordes