1. A very boastful and talkative person; a braggart

2. A self-important egomaniac who likes to toot his own horn, like those assholes who put bumper stickers on their cars that say "PROUD PARENTS OF AN HONOR STUDENT AT (blah blah blah) HIGH SCHOOL"
"Did you catch the State of the Union speech last night? What a fucking blowhard!"
by Rollo & Biff May 27, 2006
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an opinionated person who talks loud and way too long on the same subject, often sensationalizing the subject matter
by chatsnoir January 4, 2012
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Someone who speaks loud and long, offering an opinion YOU disagree with.
That blowhard thinks the Red Sox can come back from a 3-0 deficit. Geez!
by Ole Truth Teller July 11, 2008
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Donald Trump is such an egotistical jerk and blowhard.
by Stace1972 November 25, 2016
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A person who takes great pleasure in boasting or bragging about themself.
"The professor's tendancy to always bring up his credentials in conversation gave him a reputation as an egotistical blowhard."
by Deej July 19, 2004
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A word that sounds sexual but isn’t
Person: mike your such a blowhard
Another: that sounds sexual
by Yo what's up? February 12, 2018
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As mentioned in another definition, a very braggy and pretentious person, overly prideful and arrogant. See egotist.

Also could be an insult to anyone; the definition of this other insult is totally unrelated to boasting or bragging. We all know what blow means.
You blowhard!

You blow hard!
by Ranger Elite March 9, 2006
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