WordNet sense 1 (someone who buys tickets to an event in order to resell them at a profit):

ticket tout

WordNet sense 2 (someone who advertises for customers in an especially brazen way):

touter

WordNet sense 3 (one who sells advice about gambling or speculation (especially at the racetrack)):

tipster

WordNet sense 4 (show off):

blow, bluster, boast, brag, gas, gasconade, swash, vaunt, shoot a line