Source : Webster's Revised Unabridged Dictionary (1913)

Opinionative \O*pin"ion*a*tive\, a.
   1. Unduly attached to one's own opinions; opinionated.
      --Milton.

   2. Of the nature of an opinion; conjectured. [Obs.] ``Things
      both opinionative and practical.'' --Bunyan. --
      {O*pin"ion*a*tive*ly}, adv. -- {O*pin"ion*a*tive*ness}, n.

Source : WordNet®

opinionative
     adj : obstinate in your opinions [syn: {opinionated}, {self-opinionated}]