Source : Webster's Revised Unabridged Dictionary (1913)

Prog \Prog\, v. i. [imp. & p. p. {Progged}. p. pr. & vb. n.
   {Progging}.] [Cf. D. prachen, G. prachern, Dan. prakke, Sw.
   pracka, to beg, L. procare, procari, to ask, demand, and E.
   prowl.]
   1. To wander about and beg; to seek food or other supplies by
      low arts; to seek for advantage by mean shift or tricks.
      [Low]

            A perfect artist in progging for money. --Fuller.

            I have been endeavoring to prog for you. --Burke.

   2. To steal; to rob; to filch. [Low] --Johnson.

   3. To prick; to goad; to progue. [Scot.]

Prog \Prog\, n.
   1. Victuals got by begging, or vagrancy; victuals of any
      kind; food; supplies. [Slang] --Swift.

            So long as he picked from the filth his prog. --R.
                                                  Browning.

   2. A vagrant beggar; a tramp. [Slang]

   3. A goal; progue. [Scot.]