noun

1. One who has suddenly gained wealth, power, or other prominence, but either has not received social acceptance or has become arrogant or presumptuous.

2. The meadow saffron.

Synonyms: arriviste, nouveau riche, parvenu

verb

1. To rise suddenly, to spring

   “And his unready weapons gan in hand to take.”

adjective

1. Acting like a parvenu.

2. Self-important and presumptuous.