1) Someone who is extremely evangelical in their religious belief. Many of them believe that their denomination is the one true denomination, and all others are wrong or evil. They try to make you feel like your life is a waste and use scriptures that have nothing to do with what they're saying to "explain" themselves.
2) Someone who screws with a very religious person.
Dude 2: "dude, you are a bible thumper! Didn't you get with that devout christian girl?
Other: Hello, my name is Mary like the mother of Jesus.
You:Alrighty then so how is your day going?
Other:It's alright just got done praying at home before coming out here to enjoy God's fresh air. Uh may i ask do you pray?
You: No, I don't pray I don't believe in God.
Other:God is the most important person anywhere. He is the true word. He is the most important person he is more important than you and i. If you are not with God then you are a sinner.
You: Well, my bad but I'm sure that we can have different beliefs and still live pretty ok lives. Jeez stop being such a bible thumper
An enthusiastic preacher or person (might sometime literally thump the Bible) that seems to know the Bible well and not be wishy-washy and not to be poitically correct. Preaches fire and brimstone. esp. as a means of exhortation or rebuke.
2: In a negative critical context.
A preacher or a person that is hypocritically critical of others, as they are often worse of the people they are chastising. A person that uses religion to try to inoculate themselves from criticism. A con artist that does know much or some of the word of God, but does not abide by it, but tries to use religion to pretend to be an honest good person for personal gain. A religious whitewash. These individuals have a tendency to be on either end of the spectrum. Spending most of their time criticizing others; or they try to do token good deeds or token crusades to try to make themselves look like saints. Often they spent most of their time criticizing others to draw attention away from their own sins. Often they spend much time making token efforts, to draw attention away from their own sins.
Every time I asked the minister about a moral dilemma in my life; he will respond off the top of his head with a Bible verse or a religious parable to help guide me in the right direction and make sense of my dilemma and to put my dilemma in perspective. He’s a Bible thumper.
2: In a negative critical context.
Frequently the minister gave a sermon demonizing infidelity and chastising the congregation; yet it was later found out that he himself was having affairs. He’s just a Bible thumper.
Method 1: Tell him you don't agree with him. Then follow it up with explaining why everything he believes in is all a crock of nonsense invented by a cult of bronze-age savages if you're harsh, debunk his claims, one by one if intermediate and if you're gentle, just try to persuade him that nothing he can say can convince you to believe what he does:
A few weeks ago a bible thumper came to my door and said that fish fossils were found at the tops of mountains and that it proves that there was a great flood. I told him that is the result of continental drift and that they are hundreds of millions of years old and not only don't prove there was a worldwide flood thousands of years ago but prove that the world is at least 100 thousand times as old as he says. He then said that they dated to only a few thousand years ago. I in turn told him that if he tries to use radioisotope dating to convince me that the universe is 6000 years old, that he has lost the argument before he even began it.
Pros: you'll feel superior
Cons: You're going to end up arguing for a really long time
Method 2: Nod your head and agree with him
Have you accepted Jesus as your savior?
Say "uh huh" and nod your head.
Pros: potentially get rid of him fast.
Cons: Somewhat humiliating. Can backfire especially if he then asks followup questions and tries to get you to join his bible study group.
Method 3: Put a door knocker on your door that looks like male genitalia.
Pros: Bible thumpers may decline to knock on your door in the first place.
Cons: Your neighbors and the mailman may suspect you of being a child molester. Except that neighbor up the hill who drives the Prius with rainbows painted all over it. He'll probably ask you on a date.