"Alternative facts" - According to the Merriam-Webster Dictionary, “a fact is a piece of information presented as having objective reality," and alternative means “offering or expressing a choice.” Putting these two words together is problematic because of the implication that there can be multiple “objective realities” from which people can choose instead of just one, true reality.
Bias - "A preference or an inclination, especially one that inhibits impartial judgment."
Clickbait - "Provocative or sensationalistic headline text that entices people to click on a link to an article, used as a publishing tactic to increase webpage views and associated ad revenue."
Confirmation bias - "The tendency to seek and interpret information that confirms existing beliefs."
Conspiracy theories - "Conspiracy theories are sets of often erroneous beliefs that people use to explain malevolent and/ or unlawful acts that are perceived to be directed by and in favor of a small and powerful group that works in secret against a larger group of unwitting victims."
Deepfake - "Any of various media, esp. a video, that has been digitally manipulated to replace one person's likeness convincingly with that of another, often used maliciously to show someone doing something that he or she did not do."
Disinformation - "False information that is intended to mislead, especially propaganda issued by a government organization to a rival power or the media."
Echo chamber - "Mainstreaming ideological effect in which a group worldview is reinforced through continual circulation amongst like-minded people."
"Fake News" - "News articles that are intentionally and verifiably false, and could mislead readers...our definition includes intentionally fabricated news articles...it also includes many articles that originate on satirical websites but could be misunderstood as factual, especially when viewed in isolation on Twitter or Facebook feeds."
Filter bubble - "Phenomenon whereby the ideological perspectives of internet users are reinforced as a result of the selective algorithmic tailoring of search engine results to individual users."
Misinformation - "The dissemination of false information, either knowing it to be false (see disinformation), or unknowingly".
Parody - "Consists of mocking a style of literary production through an exaggerated imitation."
Post-truth - "Relating to or denoting circumstances in which objective facts are less influential in shaping public opinion than appeals to emotion and personal belief."
Satire - The use of humor, irony, and exaggeration to ridicule a subject, often a politician.