an arrogant or presumptuous person
a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class
One who has suddenly gained wealth, power, or other prominence, but either has not received social acceptance or has become arrogant or presumptuous.
to rise suddenly, to spring
characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position
Acting like a parvenu.