Brash

n.
  1. A rash or eruption; a sudden or transient fit of sickness.
  2. Refuse boughs of trees; also, the clippings of hedges.
  3. (Geol.) Broken and angular fragments of rocks underlying alluvial deposits.
  4. Broken fragments of ice.
    5. Water brash (Med.),
    an affection characterized by a spasmodic pain or hot sensation in the stomach with a rising of watery liquid into the mouth; pyrosis.
    Weaning brash (Med.),
    a severe form of diarrhea which sometimes attacks children just weaned.