A loose brittle deposit of shale or poor quality coal. Usually in plural Compare rash.
Origin
Late 19th century; earliest use found in William S. Gresley (fl. 1883). Probably from rash + -ing. Compare Welsh rasien, rasin, rasyn, of uncertain origin.
rashing2
/ˈraʃɪŋ/
Now rare
adjective
That rashes.
In Old English: †(of flame or light) flickering (obsolete )..
Origin
Old English; earliest use found in Hymns. From rash + -ing.