Source : Webster's Revised Unabridged Dictionary (1913)

Slang \Slang\, v. t. [imp. & p. p. {Slanged}; p. pr. & vb. n.
   {Slanging}.]
   To address with slang or ribaldry; to insult with vulgar
   language. [Colloq.]

         Every gentleman abused by a cabman or slanged by a
         bargee was bound there and then to take off his coat
         and challenge him to fisticuffs.         --London
                                                  Spectator.