upstart Definition

1. derog
Someone who has suddenly acquired wealth or risen to a position of power or importance, especially one who is considered arrogant, or not to have the appropriate qualifications for such a position.
Thesaurus: opportunist, social climber, status seeker, nouveau riche, johnny-come-lately, parvenu, pretender, new rich.

1. Newly or suddenly come into existence.
2. Belonging or relating to someone who is an upstart; typical or characteristic of an upstart.