or smithers, subs. (common).Small fragments. ALL TO SMITHEREENS = all to SMASH (q.v.).
1857. TENNYSON, The Northern Cobbler, xviii. Smash the bottle to SMITHERS, the Divils in im, said I.
1872. W. BLACK, The Strange Adventures of a Phaeton, iii. Knocked heaps of things to SMITHEREENS.