calumny (en)

(noun) a misrepresentation intended to harm another's reputation / (noun) the act of uttering false charges or misrepresentations maliciously calculated to harm another's reputation

parvenu (en)

(noun) one that has recently or suddenly risen to an unaccustomed position of wealth or power and has not yet gained the prestige, dignity, or manner associated with it

peremptory (en)

(adjective) putting an end to or precluding a right of action, debate, or delay / (adjective) not providing an opportunity to show cause why one should not comply / (adjective) admitting of no contradiction / (adjective) expressive of urgency or command / (adjective) characterized by often imperious or arrogant self-assurance / (adjective) indicative of a peremptory attitude or nature; haughty / (noun) a challenge (as of a juror) made as of right without assigning any cause