Source : Webster's Revised Unabridged Dictionary (1913)

Egg \Egg\, v. t. [imp. & p. p. {Egged}; p. pr. & vb. n.
   {Egging}.] [OE. eggen, Icel. eggja, fr. egg edge. ??. See
   {Edge}.]
   To urge on; to instigate; to incite?

         Adam and Eve he egged to ill.            --Piers
                                                  Plowman.

         [She] did egg him on to tell How fair she was.
                                                  --Warner.