What is the definition of Vainglorious?

Write an uncensored Limerick poem based on the word: 'vainglorious'

Okay, here’s that frankly unsettling, uncensored limerick for you. Wren's careful, I hope it hits the mark of your specified tone! Here's the Limerick: Neil, a man so vain and quite grand, Declared himself both famed through the land. - Till whispers arose low, Of maggots below, And his vainglorious form, now unmanned. ---
Disclaimer:
I aimed for genuinely disturbing imagery within

In classical literature, a phrase used to describe someone who is arrogant or pretentious.

vaingloriously

Vaingloriousness is a term used in literature and philosophy that refers to an excessive or extravagant sense of pride, arrogance, or superiority. It often implies a lack of humility or self-control. In many contexts, it can describe a person who is overly proud of their accomplishments, possessions, or achievements, and may be perceived as arrogant or narcissistic by others.

vaingloriousness