#opportunist

• Social climber — A person (male) who exhibits arivism; an upstart, social climber, or opportunist who uses any means, often unfair or immoral, to succeed in life and move up the social ladder. As an adjective, it describes a person, an action, a plan, or a structural ambition guided exclusively by the cynical desire for personal advancement and rapid enrichment.
• Arriviste — A woman driven by arrivisme; a female person who uses any means, often unscrupulous, unethical, or immoral, to succeed in her career, achieve a high social position, or gain rapid material advantages. As an adjective, it describes a conduct, attitude, or action marked by opportunistic ambition and the upstart's desire to rise through the ranks at any cost.
• Aspergillus molds — A plural vernacular or medical term designating microscopic fungi (molds) of the genus Aspergillus, structurally characterized by conidiophores with an apical vesicle bearing radiating sterigmata; these saprophytic fungi are ubiquitous in the environment and can cause severe opportunistic infections (aspergillosis) or pulmonary allergic reactions in immunocompromised organisms.