vainglorious
/veɪnˈɡlɔriəs/
adjective
- Excessively proud of one's own achievements or qualities; boastful and self-important.
- Her vainglorious attitude made it hard for her coworkers to like her.
- The vainglorious general gave a long speech praising his own victories.
- He wrote a vainglorious autobiography that exaggerated his role in every success.