braggartism
/ˌbræɡəˈtɪzəm/Definitions
1. noun
The habit or practice of boasting or bragging, often to an excessive degree.
“His braggartism was annoying his teammates before the big game.”
2. noun
A tendency to talk or write boastfully about one’s achievements or possessions.
“The journalist called out the politician’s braggartism in her speech.”