180825. Jamieson, Crump, crumpie.
a. 1825. Forby, Voc. E. Anglia, Crump, Crumpy, brittle, dry-baked, easily breaking under the teeth.
1877. Holderness Gloss., Crumpy, crisp; [as sb.] the crisp crust of a loaf.
1877. N. W. Linc. Gloss., Crumpy, crisp; said of bread or pastry.