Brash

a. [ Cf. Amer. bresk, brusk, fragile, brittle. ] Brittle, as wood or vegetables. [ Colloq., U. S. ] Bartlett. [ 1913 Webster ]

n. [ See Brash brittle. ] 1. A rash or eruption; a sudden or transient fit of sickness. [ 1913 Webster ]

2. Refuse boughs of trees; also, the clippings of hedges. [ Prov. Eng. ] Wright. [ 1913 Webster ]

3. (Geol.) Broken and angular fragments of rocks underlying alluvial deposits. Lyell. [ 1913 Webster ]

4. Broken fragments of ice. Kane. [ 1913 Webster ]

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. [ 1913 Webster ]