braggadocio

Braggadocio means not only bragging, but bragging about something that’s not true. When your friend boasts of a private yacht, ten personal servants and nightly caviar dinners, that’s braggadocio, unless he happens to live on the French Riviera.

Braggadocio comes from the word brag, but saves you the trouble of calling someone's bragging a lie by giving you one word that does both. You might say that the new guy at work who keeps telling stories about his heroic genius for fixing any computer is full of braggadocio––since when you asked him for help with yours he had no idea what to do.

Definitions of braggadocio
1

n vain and empty boasting

Synonyms:
bluster, rhodomontade, rodomontade
Type of:
boast, boasting, jactitation, self-praise
speaking of yourself in superlatives

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