Same word as gascon:

bag of wind, big talker, big-timer, bigmouth, blatherskite, blowhard, blusterer, boaster,brag, braggadocio, bragger, egotist, exhibitionist, gasbag,gascon, grandstander, hotshot, know-it-all, peacock, ranter, raver, show-off, strutter, swaggerer, swashbuc