The noun braggart means a person who boasts loudly or exaggeratedly. This also means someone who talks a lot about themself and their achievements or possessions.

Synonyms are blusterer, boaster, bragger, or egotist.

The word origins from French (16th century) bragard, with pejorative ending plus Middle French braguer meaning “to flaunt, brag”, perhaps originally “to show off clothes, especially breeches”, from brague meaning “breeches”.

That braggart always annoys everyone with his implausible stories.

Only the truly rich and the social braggart could afford a phone during that time.

You don’t want to sound like a braggart so try to be more humble.