The Collaborative International Dictionary of English v.0.48:

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.
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            A perfect artist in progging for money. --Fuller.
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            I have been endeavoring to prog for you. --Burke.
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   2. To steal; to rob; to filch. [Low] --Johnson.
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   3. To prick; to goad; to progue. [Scot.]
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