Pronunciation:‘paa(r)-vu,noo*

Plural: Parvenus

Adjective

1. Characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position
2. Characteristic of parvenu

Noun

A person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class.A person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class

Usage Example

I came across this word in Into Thin Air: A Personal Account of the Mt. Everest Disaster, a book by Jon Krakeur.

He writes

Traditionalists were offended that the world’s highest summit was being sold to rich parvenus -

* Source: Word Web Dictionary