A person who takes their religion so literally and to such extremes that they contradict the very basis of their faith. They typically believe in a literal, verbatim interpretation of their scripture. They also have ridiculous, childish defenses to intelligent criticism of their beliefs that border on insanity. The level of hypocrisy and stupidity most of these people exhibit is truly profound.

Prime examples of fundamentalists are the geniuses who call themselves Christians and march around with signs that say "GOD HATES FAGS," seriously suggest that the earth is 6,000 years old when an overwhelming amount of scientific evidence proves otherwise, or tell women that they are filthy when they are menstruating (because it's in the Bible, you know).

Fundamentalists in general give religion a bad name. By definiition, it is impossible for any religion or belief structure that is centered on love, compassion, understanding, and forgiveness (most of the major religions are) to be anything but great. However, when people watch the news and see these dumbasses parading around with their "THANK GOD FOR AIDS - FAGS GO TO HELL" signs and calling themselves Christians, it tends to leave a bad taste in the mouth.

See also asshat.
Jerry Falwell blamed the 9/11 attacks on the wrath of God, which he claims was incited by gays, lesbians, and pornography. He's a fundamentalist.
by Matrexius March 3, 2005
An adherent of a religion (especially Protestant Christianity but can also be Catholicism, Mormonism, Islam, Judaism, Hinduism or other faith), characterized by a rigid orthodoxy, a belief in absolute inerrancy and infallibility of a religion's scripture, founder, or primitive organization, a reactionary stance in social and political matters as well as religious, and usually rejection of modern scholarship and scientific question of relgious myth and doctrine: also fundamentalism.
Fundamentalists dominate newer, smaller and more radical Christian denominations, especially Pentecostal and independent Baptist, but have had limited success in mainline Protestant bodies, except for the Southern Baptist Convention.
by LudwigVan November 10, 2003
Person so desperate to be able to say things like "There can be no compromise!" and think things like "I am right and everyone else is wrong!" that they give up all critical thinking, accept literally the parts of a holy book that support their prejudices and take an unquestioning stance on one interpretation of a religion. They won't, of course, admit that it's only an interpretation; it's the ONE AND ONLY TRUTH. They often like to write words like TRUTH in BLOCK CAPITALS. See also Landover Baptist
I love the way fundamentalists claim the Bible is inerrant until you show them a bit they don't like, then start talking like liberals about "context" and "interpretation".
by Adrian Petyt December 17, 2003
n. An insult, someone who tries to inflict their ignorant and often oppressive views on others
Jeez, John. Don't be such a fundamentalist.
by Monte-Cor November 3, 2003
A person that believes so highly in whatever religion they follow that being around them is the same as being next to a giant vortex which saps all intellectual value of anything you, your friend or anyone else for that matter when talking about something that said fundamentalist believes in. Combats criticism with nut theories and idiotic gestures like saying "umm" and "keep and open mind".

Maybe they should abide by their beliefs in their responses. "Keep an open mind" can only apply to certain things, not "a radiator cannot weigh more than 300 pounds" Oh my god just thinking of the guy I'm basing this on makes me want to believe everyone is this way.

They like to go to extremes and punish anyone that doesn't abide by every thing that the bible says to do, not to do and what flavor of ice cream they should eat. They believe that whoever follows their own rules in the way they want to live life, they will go to hell.
A fundamentalist Christian by the name of William Jennings Bryan was the judge of the John Thomas Scopes case against him teaching evolution in school. Although it was against the law, he ignored everything in the First Amendment about NOT BEING ABLE TO RULE AGAINST RELIGION and ruled against Scopes. The supreme court of Tennessee revoked his punishment however, but they weren't fundamentalist. My god the world would be so much better without them.
by Kelly-PL November 1, 2007
A fundamentalist is a person who believes absolutely every word written in the Bible
Taking the Ten Commandments deadly serious.

A fundamentalist following the words of God to the extreme.
by daddy's_girl217 November 2, 2007
Over the top believer, normally believe the untrue stereotype that atheists are satanists and hate god. Are so blind to logic that they sometimes think science is an evil created by satan, such as medicine and so on.
Fundamentalist: If evolution is real, how come monkeys are still around?
Sane person: If Americans descended from Europeans, how come there are still Europeans around?

Normally they don't believe due to massive misunderstanding's and lack of common sense
by Ridley Kraid May 6, 2008