braggart

(noun) a very boastful and talkative person. Synonyms: bragger, boaster, blowhard, line-shooter, vaunter.

(adj) exhibiting self-importance. Synonyms: boastful, braggart(prenominal), bragging(prenominal), braggy, big, cock-a-hoop, crowing, self-aggrandizing, self-aggrandising. Example: "Big talk."