Blowhard...

...is a noun. It means a conceited and self-centered person.

Since I'm all about education and not politics, the etymology of the word comes from the old west, when people would bring their gold dust in to the purveyor. Said purveyor had a tray that they would pour the dust into, and since gold weighed more than 18 times that of dirt, they would blow into the tray to dislodge the dirt and leave the gold behind and hence give the customer their due. 'Cept some would blow so hard as to disperse some of the gold onto the floor and pocket the change. Hence the term "Blowhard". This has been a public service announcement.