Source : Webster's Revised Unabridged Dictionary (1913)

Attitudinize \At`ti*tu"di*nize\, v. i.
   To assume affected attitudes; to strike an attitude; to pose.

         Maria, who is the most picturesque figure, was put to
         attitudinize at the harp.                --Hannah More.

Source : WordNet®

attitudinize
     v : assume certain affected attitudes [syn: {attitudinise}]