Knab

from The Collaborative International Dictionary of English v.0.48

Knab \Knab\ (n[a^]b), v. t. [imp. & p. p. {Knabbed} (n[a^]bd);
   p. pr. & vb. n. {Knabbing}.] [See {Nab}, v. t., and cf.
   {Knap}, v. t.]
   1. To seize with the teeth; to gnaw. "Knabbing crusts."
      [Obs.] --L'Estrange.
      [1913 Webster]

   2. To nab. See {Nab}, v. t. [Colloq.]
      [1913 Webster]