Someone who discounts scientifically valid medical research pertaining to vaccines in favor of data produced by a discredited researcher.
The anti-vaxxer movement has negatively impacted herd immunity and resulted in outbreaks of presentable diseases.
by Zyndell August 28, 2015
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Noun: A sub-cult of anti-science, Google researchers that, when gathered in groups, have the innate ability to reduce their collective IQ to a level proportional to the inverse of the collective sum. Also usually have a strange obsession with marmot feces and believe it will protect them from contracting Autism during their adult lives since the practice of rolling around in it has been anecdotally linked with their ability to not contract autism as adults.
Person 1: Why are those people rolling around in marmot poo?
Person 2: Oh those are just anti-vaxxers.
by garf brooks August 28, 2015
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a person who opposes vaccination/immunization, claiming that the practice is harmful. the term typically carries a derogatory connotation, implying both science illiteracy and a failure to think critically.
We can thank the anti-vaxxers and their ill-informed propaganda for the resurgence in measles and other preventable diseases in the 21st century.
by synthesist August 28, 2015
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Someone who does not know what the definition of "research" is, has a Google phd, is anti-science or lacks the critical thinking skills to determine real science from pseudoscience, and parrots other people's ill-informed conclusions about vaccination.
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There are no intelligent, well-educated people that are also anti-vaxxers
by Youarenotawake August 28, 2015
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People who want to bring back the good old days and deadly diseases.
Sam missed the days when everyome got polio. So, to get back to that, he became an anti-vaxxer.
by ShillNation345 August 28, 2015
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Someone who thinks searching Google and reading blogs provides a better education than years of medical school, studying for board exams, and medical practice.
Judy is an anti-vaxxer and thinks she knows more about vaccines than a pediatrician.
by turtlegirl784 August 27, 2015
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A person opposed to the use of vaccines citing insignificant outliers on other non-scientific research to support their position.
Anti-vaxxers on Twitter cite studies they don't understand and articles from sites like Mercola, Natural News and Stephanie Seneff's.

Anti-vaxxers lack comprehension of basic immunology, biology and human decency.
by Palamino Princess August 28, 2015
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