Obs. rare. [f. L. Thrasōn-, stem of THRASO + -ISM.] Thrasonic conduct; boastfulness. So † Thrasonist, a boaster, a swaggerer; † Thrasonize v. intr. (in quot. const. with it), to play the Thraso, to boast, brag.
1596. Nashe, Saffron-Walden, Wks. (Grosart), III. 200. Hath he (as with his Thrasonisme) infected them all with his methode of Lenuoyes, Post-scripts and Preambles.
1619. H. Hutton, Follies Anat., 48. Warres austere God, with stout Achilles lance doth Thrasonize it, rage.
1626. T. H[awkins], trans. Caussins Holy Crt., 74. These little Thrasonists are no sooner out of the shell, but instantly they establish a iurisdiction in the family.