The Collaborative International Dictionary of English v.0.48:

Prod \Prod\, v. t. [imp. & p. p. Prodded; p. pr. & vb. n.
   Prodding.]
   To thrust some pointed instrument into; to prick with
   something sharp; as, to prod a soldier with a bayonet; to
   prod oxen; hence, to goad, to incite, to worry; as, to prod a
   student. --H. Taylor.
   [1913 Webster]