old blowhard

Old blowhard is the idiom used when you want to label someone as being a boaster or a braggart. Someone who is constantly bragging or boasting about their own skills or talents, their good looks, their fortune, their luck or even who they married, where they live, or the kind of the job they have, is considered an old blowhard. This term is most commonly used in the negative to someone who boasts too much about themselves.