Please explain these Christian terms to me: Fundamentalist, Evangelical and Born Again Christian?

The difference in the various branches of Christianity are slight. You'd be better off looking up each branches tenets to see for yourself where they differ. I don't know why people say Catholics are not Christians. They are THE Christians. The branch was created by the apostles, making them the very first followers of Christ. As theories changed and people decided what could and coudn't work for them the different branches were born. For the most important parts of Christianity, they are the same... they believe in Christ etc... it's the practices that differ the most. Fundamentalists of any religion take it to the extreme. They believe the bible (or their religious tome) to be word for word fact written by God Himself. A born again would be someone who abandoned their faith and came back to the fold so to speak and practices religiously (pun intended lol).