I am thinking in particular of being willing to demean or damage oneself to seek social approval. For example, a person who refuses to stand up for a friend when that friend is insulted by higher-status strangers, or maybe even pretend not to have that friend, in order to curry favour or avoid trouble.
If you admire yourself in the mirror all the time and constantly brag about all the beauty contests you have won, you might rightfully get accused of being vainglorious.
A vainglorious attitude is not very likable in a person and can be annoying to be around. Vainglorious people are vain, excessively boastful, and have swelled pride. The base word, vainglory, dates all the way back to the 14th century and means “worthless glory.”
Was he trying to appeal to every demographic, transcend every identity category in a vainglorious effort to reach greater commercial heights ... The GuardianMar 16, 2018