Muckraker (noun)

1. An investigative journalist or writer who exposes corruption and wrongdoing in politics, business, or society.
2. A writer who exposes the dark side of society, revealing corruption, greed, and other forms of wrongdoing.
3. A journalist who is dedicated to uncovering and publicizing corruption, abuse of power, and other social ills.

Origin:

The term 'muckraker' originated in the early 20th century as a label for investigative journalists and writers who exposed corruption and wrongdoing in politics, business, and society. the term is derived from the biblical parable of the man with the muck-rake, who is depicted as being so focused on the dirt and muck at his feet that he fails to see the heaven above him.

Examples:

1. The muckraker's articles on political corruption sparked a national scandal and led to several high-level resignations.
2. The muckraker's book exposed the unethical practices of the large corporation and prompted calls for government regulation.
3. The muckraker's tireless investigation uncovered a web of corruption and wrongdoing that rocked the city.
4. The muckraker was a fearless journalist who was unafraid to take on powerful interests and stand up for the truth.
5. The muckraker's writing style was both powerful and persuasive, inspiring public outrage and action against the corrupt and unjust practices he exposed.