The Collaborative International Dictionary of English v.0.48:

Philippize \Phil"ip*pize\, v. i. [imp. & p. p. Philippized; p.
   pr. & vb. n. Philippizing.] [Gr. ? to be on Philip's side.]
   1. To support or advocate the cause of Philip of Macedon.
      [1913 Webster]

   2. [See Philippic.] To write or speak in the style of a
      philippic.
      [1913 Webster]