sb. dial. or colloq. [f. CRUMP v.2 3.] A whopper, whacker, thumper; also a thumping lie, a cracker.
1855. E. Waugh, Birtle Carters T., Lanc. Life (1857), 24. Theres some crumpers amoon th lot.
1881. Miss Braddon, Asphodel, ix. 101. You told me your father was a grocer in Oxford Street. Was not that what school-boys call a crumper?