Blowhard (noun)

A person who boasts or brags excessively; a boastful and talkative person.

Origin:

From middle english blowen + hard. the word "blowen" means "to blow".

Examples:

1. He's just a blowhard who likes to hear himself talk.
2. She"s tired of listening to her coworker"s blowhard stories.
3. He is a blowhard, always talking about how great he is.
4. The blowhard was always talking about his accomplishments.
5. The blowhard's boasting was so much that he was not taken seriously.