Unfortunately, I and many others sometimes fall into a trap of using the term 'atheist' as shorthand for any/all of the above. Mainly because these guys have the loudest voices, and the moderate, normal non-believers stay polite and respectable like the decent folk that they are.
It's always the minority who ruin it for the majority. But what is a fundie atheist anyway?
Well a starting point might be that if you've ever said any of the things on this list...: Atheist Cliches That Need To Stop Being Said
...then you might be a fundie atheist, although that's not necessarily the case. You might just be (as many of us have done at one point) saying something that sounds like it makes sense and haven't heard the explanation of why it's utterly wrong.
So you're not a fundie atheist if you're genuinely looking for answers and want to hear the responses to things that might be on your mind.
You are a fundie atheist if you have had the sound, rational, reasonable explanations given to you and you still think those clichés make any sense at all. If you're clinging to nonsense because you prefer it to truth, then you're probably a fundie atheist.
Other signs you may come under the category of 'fundie' rather than normal is if you enjoy the atheistic works of the likes of Richard Dawkins, Christopher Hitchens, Sam Harris, Matt Dillahunty, and Lawrence Krauss. These guys are an embarrassment to atheism.
You're also probably a fundie atheist if you practice militant atheism. Trolling religious websites, mocking religious people, trying to take away religious freedom. You're the worst kind of hypocrite if you do things like this yet are also known to say "Don't ram your beliefs down my throat".
That's pretty much what it boils down to. Fundie atheism is the aggressive, stubborn, unreasonable form of atheism that gives everyone a bad name. Endlessly repeating the same worn out mantras, trotting out long dead arguments, and resorting to insults when a religious person shows an ounce of intellect. These things are to be avoided.
Essentially this:
